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					                          NARAYANA
                          I    I   T         A     C    A    D     E    M     Y

                     ALL INDIA TEST SERIES
                        NA RA YA NA FULL TEST – 4
                                          PAPER – II
Ti m e : 3 ho ur s                                                  M a xi mu m m ar k s: 2 4 3
INSTRUCTIONS :
1) This booklet is your Questions Paper containing 57 questions. Maximum marks: 237.

2) The question paper consists of 3 parts (Chemistry, Mathematics and Physics). Each part
   consists of 4 sections.

3) Section-I contains 6 multiple choice questions. Each question has 4 choices (A), (B), (C) and
   (D), out of which ONLY ONE is correct. For each question in Section I, you will be awarded
   5 marks if you have darkened only the bubble corresponding to the correct answer and zero
   mark if no bubbles are darkened. In all other cases, minus two (-2) mark will be awarded.

4) Section-II contains a group of 5 questions. The answer to each of the questions is a single
   digit integer, ranging from 0 to 9. The correct digit below the question number in the ORS is
   to be bubbled. For each question in Section II, you will be awarded 3 marks if you darken the
   bubble corresponding to the correct answer and zero mark if no bubble is darkened. No
   negative marks will be awarded for incorrect answers in this Section.

5) Section-III contains 2 paragraphs. Based upon each of the paragraphs 3 multiple choice
   questions have to be answered. Each of these questions has 4 choices (A), (B), (C) and (D)
   out of which ONLY ONE is correct. For each question in Section III, you will be awarded 3
   marks if you darken only the bubble corresponding to the correct answer and zero mark if no
   bubbles are darkened. In all other cases, minus one (-1) mark will be awarded.

6) Section-IV contains 2 questions. Each question has four statements (A, B, C and D) given in
   Column I, and five statements (p, q, r, s and t) in Column II. Any given statement in Column I
   can have correct matching with one or more statement(s) given in Column II. For example, if
   for a given question, statement B matches with the statements given in q and r, then for that
   particular question, against statement B, darken the bubbles corresponding to q and r in the
   ORS. For each question in Section IV, you will be awarded 2 marks for each row in which
   you have darkened the bubble(s) corresponding to the correct answer. Thus, each question in
   this section carries a maximum of 8 marks. There is no negative marks awarded for incorrect
   answer(s) for this section.
                                                                              NFT-4_ PAPER-2

                                      CHEMISTRY
                                            SECTION-1
Section-I (Single Correct Choice Type) contains 6 multiple choice questions. Each question
has 4 choices (A), (B), (C) and (D), out of which ONLY ONE is correct. For each question in
Section I, you will be awarded 5 marks if you have darkened only the bubble corresponding
to the correct answer and zero mark if no bubbles are darkened. In all other cases, minus two
(-2) mark will be awarded.
1) During the Hinsbergs Test, which of the following primary amines
     is most likely to be detected as a secondary amine?

   A) MeNH 2                             B)                  NH2

   C)                        NH2         D)                                        NH2
2) Which of the following will not show fermentation?
                                                                                   CHO
                                                           CHO
                                   CHO                                        H        OH
                                                     H        OH
            CHO
                               H      OH                                      H        OH
    A) HO        H        B)                     C) H         OH         D)
                               H      OH                                      H        OH
            CH2OH                                    H        OH
                                   CH2OH                                      H        OH
                                                           CH 2OH
                                                                                   CH 2OH

3) In qualitative analysis, ammonia is used to separate
    A)   NaCl from KCl                          B)   AgCl from Hg 2 Cl2
    C)    PbCl2 from Mg ( OH )2                 D)    FeCl3 from AlCl3

4) Which oxide of Mn is acidic in nature ?
   A)                                    B)
   C)                                    D)



                                    Space for rough work                          Page 2 of 20
                                                                              NFT-4_ PAPER-2
5) In which of the following does the overlap of two orbitals give a non bonding interaction ?

    A)       +     -    +                                      B)     -      +    +


                                                                      +
    C)
             -     + +          -                              D)    +
                                                                         -

6) The correct order of ionic mobilities of the following ions in aqueous solution is:
   A)    Li+ > Na + > K+ > Rb +                   B)    Na + > K+ > Rb + > Li+
   C)    Rb + > K+ > Na + > Li+                   D)    Rb + > Na + > Li+ > K+




                                          SECTION-2
Section-II (Integer Type) contains a group of 5 questions. The answer to each of the
questions is a single digit integer, ranging from 0 to 9. The correct digit below the question
number in the ORS is to be bubbled. For each question in Section II, you will be awarded 3
marks if you darken the bubble corresponding to the correct answer and zero mark if no
bubble is darkened. No negative marks will be awarded for incorrect answers in this Section.
7) Some % of sample of N2 must be allowed to escape off. Its temperature, pressure
    and volume are to be changed from 2200 C , 3 atm, 2L to1100 C , 0.6 atm and 1L
    respectively. If answer for % is mn % , what is the value of (m - n)?
8) An electron beam can undergo diffraction by crystals. Through what potential
   should a beam of electrons be accelerated so that its wavelength becomes equal to
         0
    1.54 A ? Take answer as " xy " volts , what is value of x + y ? (For example if volts = 81
           then x + y = 9)

9) A metal M of molar mass 96 gm/mole reacts with fluorine to form a salt that can be
   represented as MFx . In order to determine X, a 41.20gm of the sample of the salt
   is dissolved in 100gm of water and its elevation in boiling point was determined to be
   1.38K. What is value of x? Given K b (water) = 0.512K kg / mole .

                                    Space for rough work                         Page 3 of 20
                                                                                NFT-4_ PAPER-2

                        ®
10) Z(s) + Cu 2+ (aq) ¾ ¾ Cu(s) + z 2+ (aq)
    At 300K; E cell = 1.10volt and at 310K, E cell = 1.12Volt then if entropy change

    (D S)for the above cell reaction is "xyz"J / K . Find (x + z - y).(for example if
    D S = 449 J / K then X + Z - Y = 9 )

11) The binding energy of electrons in a metal is 250 KJ/mol, then if threshold
    frequency of metal is given by x ´ 10y sec- 1 . Value of x to nearest integer is ?

                                           SECTION-3

Section-III (Paragraph Type) contains 2 paragraphs. Based upon each of the paragraphs 3
multiple choice questions have to be answered. Each of these questions has 4 choices (A),
(B), (C) and (D) out of which ONLY ONE is correct. For each question in Section III, you
will be awarded 3 marks if you darken only the bubble corresponding to the correct answer
and zero mark if no bubbles are darkened. In all other cases, minus one (-1) mark will be
awarded.
P) Although chlorobenzene is inert to nucleophilic substitutions, it gives quantitative yield of
   phenol when heated with aq. NaOH at high temperature and under high pressure. Phenol, so
   formed, is a weaker acid than the carboxylic acid, hence it dissolves only in strong base like
   NaOH, but not weak like NaHCO3 . It reacts with acid chlorides and acid anhydrides in the
   absence of AlCl3 to form esters. As far as nucleophilic substitution in phenol is concerned,
   the - OH is an activating group, hence its presence enhances the electrophilic substitution in
   the ortho and para position.
   Condensation with formaldehyde is one of the important properties of phenol. The
   condensation may take place in presence of acids or alkali and leads to the formation of
   Bakelite, an important industrial polymer.

12) Conversion of chlorobenzene into phenol involves:

   A) Modified SN1 mechanism                        B) Modified SN2 mechanism

   C) Both (a) and (b)                              D) Elimination addition

13) The o acylation of phenols with acid anhydrides can be catalysed by

    A) Sulphuric acid       B) NaOH                 C) Both                 D) None

                                     Space for rough work                         Page 4 of 20
                                                                                NFT-4_ PAPER-2
14) Condensation of phenol with formaldehyde is an electrophilic substitution, in which
   A) H2C = 0 as such is the electrophile in both acidic as well as basic medium.
   B) H2C = 0 is the real electrophile in acidic medium while in basic medium
         +       -
         C H2 - O is the real electrophile.
   C)            +
         H2C = O H and CH2 = 0 are the electrophiles in acidic and basic medium respectively.
   D)                  +       -
         H2C = 0 and C H2 - O are the electrophiles is acidic and basic medium
         respectively.
P) The carboxyl group consists of C = O and - OH , it is The - OH group undergoes change,
    either loss of H+ or replacement by another group. However, the carbonyl group markedly
    influences the reactions of carboxylic acids. The presence of the C = O part is also
    responsible for nucleophilic substitution reactions in acid derivative. Presence of an electron
    withdrawing group increases the acidity of aliphatic as well as aromatic acids. On the other
    hand, electron releasing groups impart opposite effect.
15) The marked acidity of RCOOH over ROH is due to the presence of
    A)                       B) C = O               C) Both                 D) None
16) Which statement is correct when an acid weakening group is present in benzoic acid?
   A)    Acid weakening groups activate the ring towards electrophilic substitution.
   B)    Acid weakening groups deactivate the ring towards electrophilic substitution.
   C)    Acid weakening groups activate the ring towards nucleophilic substitution.
   D)    None of the above.
17) The C = O part in carboxylic acids and their derivatives make acyl compounds more reactive
    than alkyl compounds towards nucleophilic attack because:
   A)    The carbonyl group is electron donating.
   B)    The alkyl group(R) in the acid is electron donating.
   C)    The attack of a nucleophile on a flat acyl compound is less sterically hindered.
   D)    Tetrahedral carbon atoms cannot have pentavalent transition states.




                                      Space for rough work                        Page 5 of 20
                                                                              NFT-4_ PAPER-2
                                          SECTION-4
Section-IV (Matrix Type) contains 2 questions. Each question has four statements (A, B, C
and D) given in Column I, and five statements (p, q, r, s and t) in Column II. Any given
statement in Column I can have correct matching with one or more statement(s) given in
Column II. For example, if for a given question, statement B matches with the statements
given in q and r, then for that particular question, against statement B, darken the bubbles
corresponding to q and r in the ORS. For each question in Section IV, you will be awarded 2
marks for each row in which you have darkened the bubble(s) corresponding to the correct
answer. Thus, each question in this section carries a maximum of 8 marks. There is no
negative marks awarded for incorrect answer(s) for this section.

18) Match the Following:
                  Column I                                     Column II
     (a)   Ilmenite                          (p) Iron
     (b)   Dolomite                          (q) Magnesium
     (c)   Carnallite                        (r)   Potassium
     (d)   Chromite                          (s)   Titanium
                                             (t)   Calcium
19) Match the Following:
                  Column I                                     Column II
     (a)   Gas evolved by the action of      (p) Colour of acidified KMnO4 is
           dilute H2SO4 on a sulphite            discharged
     (b)   Gas evolved by the action of      (q) Acidified dichromate solution is
           dilute H2SO4 on a carbonate           turned green
     (c)   Gas evolved by heating an         (r)   Nesslers reagent gives a brown
           ammonium salt with NaOH                 precipitate
     (d)   Gas evolved by the action of      (s)   Baryta water turns milky
           dilute H2SO4 on a sulphide
                                             (t)   Alkaline nitro prusside turns violet




                                  Space for rough work                         Page 6 of 20
                                                                                           NFT-4_ PAPER-2

                                          MATHEMATICS
                                                 SECTION-1
Section-I (Single Correct Choice Type) contains 6 multiple choice questions. Each question
has 4 choices (A), (B), (C) and (D), out of which ONLY ONE is correct. For each question in
Section I, you will be awarded 5 marks if you have darkened only the bubble corresponding to
the correct answer and zero mark if no bubbles are darkened. In all other cases, minus two (-
2) mark will be awarded.
20) If f  x  y   f  x  g  y   f  y  g  x  x, y  R ,(where f  x  is not identically (zero)), then

   A) If f '  0  exists, then f '  0  also exists but not equal
                                      



   B)    If f '  0  exists, then f '  0  does not exists

   C)    If f '  0  exists, then it is equal to f '  0 

   D) None of these
21) Suppose   i is a solution of the polynomial equation
     a4 z 4  ia3 z3  a2 z 2  ia1z  a0  0 , where  ,  , a j  R  j 0,1, 2,3, 4
    which one of the following must also be a solution?

    A)     i               B)    i                   C)     i             D)    i

22) The set of values of ' a ' for which in-equation  a 1 x2   a  1 x   a  1  0 is true for all
     x  2 is

       7                         7
    A)  ,                   B)  1,                     C)  ,1               D)  3, 2
       3                         3

23) Let AB be any chord of the circle x 2  y 2  4 x  4 y  4  0 which subtends an angle of
    90 at the point  2,3 then the locus of the mid point of AB is a circle whose centre is

                                   3                          5                      5
    A) 1,5                   B)  1,                     C)  1,                 D)  2, 
                                   2                          2                      2


                                          Space for rough work                              Page 7 of 20
                                                                                                NFT-4_ PAPER-2
24)                                         A          B          A         B
      In  ABC, if BC  1,sin                  x1, sin  x2 , cos  x3 &cos  x4 with
                                            2          2          2         2
               2010                2009
       x1            x 
                     3                0 ,then length of AC is equal to
       x2             x4 
                                                                             1
      A)  1                              B)  1                    C)                     D) 1
                                                                             2
                       x
                                          
25)
      Let f  x    t 2  2t  2 dt ,where ' x ' is the set of real numbers satisfying the
                       0

                                                      
      in-equation log2 1  6 x  x2  8  0 . If f  x   ,   , then maximum value of

         is
           103                                 104                           105                106
      A)                                  B)                        C)                     D)
            3                                   3                             3                  3
                                              SECTION-2
Section-II (Integer Type) contains a group of 5 questions. The answer to each of the questions is a
single digit integer, ranging from 0 to 9. The correct digit below the question number in the ORS is to
be bubbled. For each question in Section II, you will be awarded 3 marks if you darken the bubble
corresponding to the correct answer and zero mark if no bubble is darkened. No negative marks will
be awarded for incorrect answers in this Section.
26) If the number of ordered pairs of positive integers  m, n  satisfying
      m  2n  60 & n  2m  60 is 2 K 3  K 2  2 K , then K 
27)                 x 1
                                         , x0
      If f  x                                    , then the number of solutions of the equation
                      x  1
                                2
                                         , x 1
       f  x   f 1  x   0 is/are
28)
                                                                    
                                                                         2
      If the system of equations sin x cos 2 y  a 2  1  1 and cos x sin 2 y   a  1 has a
      solution, then the value of a  2 is
29) If the number of ordered triplets  x, y, z  such that
      L.C.M  x, y   3375, L.C.M  y, z   1125, L.C.M  z, x   3375 is equal to ' k ' then
      k  47 is equal to

                                                      Space for rough work                        Page 8 of 20
                                                                                                 NFT-4_ PAPER-2
30)                                                                x  2 y 1 z
      If the length of the shortest distance between the lines                   ;
                                                                     2       3    4
      2 x  3 y  5z  6  0  3x  2 y  z  3 is K , then  3 K  is equal to (where [.]
                                                                 
      denotes greatest integer function)

                                         SECTION-3
Section-III (Paragraph Type) contains 2 paragraphs. Based upon each of the paragraphs 3
multiple choice questions have to be answered. Each of these questions has 4 choices (A), (B),
(C) and (D) out of which ONLY ONE is correct. For each question in Section III, you will be
awarded 3 marks if you darken only the bubble corresponding to the correct answer and zero
mark if no bubbles are darkened. In all other cases, minus one (-1) mark will be awarded.

                      
                           n
P) If 1  px  x 2              1  a1x  a2 x 2  ......  a2n x 2 n , where n  N , p  R .

31) If n  40, p  3, r  5 ,then which of the following is true.

      A) 135a5  6a6  4a4                                             B) 105a5  6a6  76a4
      C) 105a5  6a6  36a4                                            D) 135a5  6a6  36a4
32) The remainder obtained when
    a1  5a2  9a3 13a4  .....  8n  3 a2n is divided by  p  2 is

      A) 1                            B) 2                            C) 3                   D) 0

33) If p  3 & n is even number, then the value of a1  3a2  5a3  7a4  ......   4n 1 a2n is

      A) n                            B) 2n  1                       C) 2n  2              D) 2n
P) To find the point of contact P   x , y  of a tangent to the graph of y  f  x  passing
                                       1 1
      through origin O, we equate the slope of tangent to y  f  x  at ' P ' to the slope of OP .
                                                           f  x1 
      Hence, we solve the equation f '  x1                         to get x1 and y1 .
                                                             x1

34) The equation ln  mx   p x, where ' m ' is a positive constant has a single root for

                   m                           e                                   e                  m
      A) 0  p                       B) p                           C) 0  p              D) p 
                   e                           m                                   m                  e


                                                 Space for rough work                               Page 9 of 20
                                                                                              NFT-4_ PAPER-2

35) The equation ln  mx   p x, where ' m ' is a positive constant has exactly two roots for

             m                              e                                   e                       m
    A) p                     B) p                                C) 0  p              D) 0  p 
             e                              m                                   m                       e

36) The equation ln  mx   p x, where ' m ' is a positive constant has exactly three roots for

             m                                     m                            e                   e
    A) p                     B) 0  p                            C) 0  p              D) p 
             e                                     e                            m                   m

                                             SECTION-4
Section-IV (Matrix Type) contains 2 questions. Each question has four statements (A, B, C and D)
given in Column I, and five statements (p, q, r, s and t) in Column II. Any given statement in Column
I can have correct matching with one or more statement(s) given in Column II. For example, if for a
given question, statement B matches with the statements given in q and r, then for that particular
question, against statement B, darken the bubbles corresponding to q and r in the ORS. For each
question in Section IV, you will be awarded 2 marks for each row in which you have darkened the
bubble(s) corresponding to the correct answer. Thus, each question in this section carries a maximum
of 8 marks. There is no negative marks awarded for incorrect answer(s) for this section.
37) Match the following:
                                   Column -I                                               Column -II
     (A)     If x i  8  1for i  1, 2,3 where   0,1, 2,3,..... , then
                  2                                                                     (p) 9
             the number of positive integral solutions of equations
              x1  x2  x3  21 is
     (B)                                                                        n       (q)   55
             If Dn is the digit in the units place of the number                 r!,
                                                                                r 1
             then D1  D3  D5  ....  D21 is equal to
     (C)     Let S  a  N , a  100 . If the equation                                (r)   2
               tan 2 x   tan x  a  0 has real roots, then number of
                       
             elements in ' S ' is (where [.] represents greatest integer
             function)
     (D)     The number of solutions for                                 (s)                  37

                                  
                                       3sin 2 x cos2 x  2
                 3 sin x  cos x                              4
             is/are where x    ,  

                                              Space for rough work                                 Page 10 of 20
                                                                                 NFT-4_ PAPER-2
38)

      Match the following:

                               Column -I                                       Column -II
       (A)   Area bounded by the curves y  cos A  cos B  cos C  ,   (p)    23
                        A   B    C
              y   7 sin sin sin  , where A, B, C are angles of a
                        2   2     2
             triangle & [.] denotes greatest integer function and the
             curve x  y  2 is
       (B)                                                              (q)    3
                                                     25I 7
             If I n   e x  sin x  dx ,then
                                  n
                                                           is equal to
                      0                               I5
       (C)   If the total number of positive unequal integral solutions (r)     2
             of the equation x  y  z  w  20 is 24k , then k 
       (D)   If                               
                    y 2  5 y  3 x 2  x  1  2 x  x  R , then the (s)      21
             number of integers lying in the range of ' y ' are




                                         Space for rough work                        Page 11 of 20
                                                                              NFT-4_ PAPER-2

                                         PHYSICS
                                           SECTION-1
Section-I (Single Correct Choice Type) contains 6 multiple choice questions. Each question
has 4 choices (A), (B), (C) and (D), out of which ONLY ONE is correct. For each question in
Section I, you will be awarded 5 marks if you have darkened only the bubble corresponding to
the correct answer and zero mark if no bubbles are darkened. In all other cases, minus two (-
2) mark will be awarded.
39) An opaque sphere of radius ‘a’ is just immersed in a transparent liquid as shown in figure. A
    point source is placed on the vertical diameter of the sphere at a distance a/2 from the top of
    the sphere. One ray originating from the point source after refraction from the air liquid
    interface forms tangent to the sphere. The angle of refraction for that particular ray is 300 .
    The refractive index of the liquid is

                                                   Point source
                                         a/2                       air
                                                        liquid
                                                   a


   A)    2
          3
   B)    3
          5
   C)    4
          5
   D)    4
          7




                                     Space for rough work                        Page 12 of 20
                                                                               NFT-4_ PAPER-2

40) A particle having charge q enters a region of uniform magnetic field B (directed inwards)
    and is deflected as shown. The magnitude of the momentum of the momentum of the
    particle is

                                                      B

                                                               x


                                                 y

           x+2             qBy 2                   qB  y2                 qBy  x 2 
    A) qB               B)                      C)     +x              D)      +x
           2                 x                      2  x                   2  y    

41) The mutual inductance between the rectangular loop and the long straight wire as shown in
    figure is M.

                                                      b

                                                          B

                                             c                 a
                                        i



                                                               μ 0a  c 
    A)   M = zero                                B)       M=       ln 1+ 
                                                               2π  b 

              μ 0a  a + c                                    μ 0a  b 
    C)   M=       ln                           D)       M=       ln 1  
              2π  b                                          2π  c 


                                     Space for rough work                       Page 13 of 20
                                                                                         NFT-4_ PAPER-2
42) In the shown AC circuit phase different between currents I1 and I 2 is




                          XL                                           X  XC 
    A)           tan 1                                   B)   tan 1  L      
            2              R                                              R    

                          XL                                           X  XC    
    C)           tan 1                                   D)   tan 1  L         2
            2              R                                              R      

43) The K X-rays emission line of tungsten occurs at   0.021nm . The energy difference
    between K and L levels in this atom is about

    A) 0.51 MeV                 B) 1.2 MeV                 C) 59 keV                D) 13.6 eV

44) Activity of a radioactive substance is R1 and time t1 and R 2 at time t 2  t 2  t1  . Then the
              R2
    ratio        is :
              R1

         t2                                                     t t 
    A)                          B) e   t1 t2          C) e  1 2              D) e t1 t2 
         t1                                                      λ 




                                              Space for rough work                          Page 14 of 20
                                                                                NFT-4_ PAPER-2
                                             SECTION-2
Section-II (Integer Type) contains a group of 5 questions. The answer to each of the
questions is a single digit integer, ranging from 0 to 9. The correct digit below the question
number in the ORS is to be bubbled. For each question in Section II, you will be awarded 3
marks if you darken the bubble corresponding to the correct answer and zero mark if no
bubble is darkened. No negative marks will be awarded for incorrect answers in this Section.
45) A observer can see through a pin-hole the top end of a thin rod of height h , placed as
    shown in the figure. The beaker height is 3h and its radius h . When the beaker is filled with
    a liquid up to a height 2h , he can see the lower end of the rod. Then the refractive index of
    the liquid is  . Find the value of 2  2 .




46) In the Youngs double slit experiment apparatus shown in figure, the ratio of maximum to
    minimum intensity on the screen is 9. The wavelength of light used is  , then the value of y
       D
    is     . Find the value of 
       d




47) A large metal sheet carries an electric current along its surface. Current per unit length is  .
                                            
    Magnetic field near the metal sheet is 0 . Find the value of 2x
                                             x


                                     Space for rough work                          Page 15 of 20
                                                                                                             NFT-4_ PAPER-2
48) A charged particle is projected with velocity v0 along positive x-axis. The magnetic
    field B is directed along negative z-axis between x  0 and x  L . The particle emerges out
     at x  L  at an angle of 60 with the direction of projection. The velocity with which the
    same particle is projected  at x  0 along positive x-axis so that when it emerges out
     at   x  L  , the angle made by it is 30 with the direction of projection is pv0 . Find the
    value of 2 p 2
49) The activity of a sample reduces from A to A / 3 in one hour. If the activity after 3 hours
                                           0     0
                  A0
    more will be , then find the value of k
                  k
                                         SECTION-3
Section-III (Paragraph Type) contains 2 paragraphs. Based upon each of the paragraphs 3
multiple choice questions have to be answered. Each of these questions has 4 choices (A), (B),
(C) and (D) out of which ONLY ONE is correct. For each question in Section III, you will be
awarded 3 marks if you darken only the bubble corresponding to the correct answer and zero
mark if no bubbles are darkened. In all other cases, minus one (-1) mark will be awarded.

P) A network of resistance is constructed with R1 and R 2 as shown in figure. The potential at
   the points 1, 2, 3,……, N are V1, V2 , V3 ,....Vn respectively, each having a potential k times
   smaller than the previous one. (Example V0 = kV1, V1 = kV2 , V2 = kV3 ,....... )
                                             V1         V2             V3         VN 1        N
                               V0     R1                                                 R1
                                                   R1             R1
                                              R2             R2         R2           R2            R3




                 R1
50) The ratio       is:
                 R2


                                                                                                              k 1
                                                                                                                       2
                1                      k                                     1
    A) k 2                   B)                                  C) k                                 D)
                k                     k 1                                   k2                                 k


                                            Space for rough work                                              Page 16 of 20
                                                                                             NFT-4_ PAPER-2

                R2
51) The ratio      is :
                R3


          k 1
                   2
                                            1                   k                                  1
    A)                           B) k 2                 C)                               D) k 
            k                               k                  k 1                                k2

52) The current that passes through the resistance R 2 nearest to the V0 is :

              k  1                                                  k  1
                        2                                                        2
                            V0                                                       V0
   A)                                                     B)
                   k        R3                                           k           R3

                 1  V2                                               k  1 V0
   C)        k + 2                                      D)
                k  R3                                                 k2       R3



P) In an organ pipe (may be closed or open) of 99 cm length standing wave is setup, whose
   equation is given by longitudinal displacement
                     2π
   ξ =  0.1mm  cos      y + 0.01m  cos2π  400  t where y is measured from the top of the tube
                     0.8
   in meters and t in second. Here 0.01m is the end correction.




53) The upper end and the lower end of the tube are respectively:

    A) open-closed               B) closed-open          C) open-open                     D) closed-closed



                                            Space for rough work                               Page 17 of 20
                                                                                     NFT-4_ PAPER-2

54) The air column is vibrating in

    A)    First overtone                             B)    Second overtone

    C)    Third harmonic                             D)    Fundamental mode

55) Equation of the standing wave in terms of excess pressure is (Bulk modulus of
    air B = 5×105 N / m 2 )


                                                                           
    A)                             2π                B)                               2π
         Pex = 125π N/m2 sin                              Pex = 125π N/m2 cos
                                   0.8                                               0.8
          y + 0.01m  cos 2π  400  t                    y + 0.01m  sin 2π  400  t

                                                                            
    C)                              2π               D)                               2π
         Pex = 225π N/m2 sin                              Pex = 225π N/m2 cos
                                   0.8                                                0.8
          y + 0.01m  cos 2π  200  t                    y + 0.01m  sin 2π  200  t




                                          Space for rough work                         Page 18 of 20
                                                                               NFT-4_ PAPER-2
                                          SECTION-4
Section-IV (Matrix Type) contains 2 questions. Each question has four statements (A, B, C
and D) given in Column I, and five statements (p, q, r, s and t) in Column II. Any given
statement in Column I can have correct matching with one or more statement(s) given in
Column II. For example, if for a given question, statement B matches with the statements
given in q and r, then for that particular question, against statement B, darken the bubbles
corresponding to q and r in the ORS. For each question in Section IV, you will be awarded 2
marks for each row in which you have darkened the bubble(s) corresponding to the correct
answer. Thus, each question in this section carries a maximum of 8 marks. There is no
negative marks awarded for incorrect answer(s) for this section.

56) The circuit involves two ideal cells connected to a 1 F capacitor via a key K. Initially the
    key K is in position 1 and the capacitor is charged fully by 2V cell. The key is then pushed
    to position 2. Column I gives physical quantities involving the circuit after the key is pushed
    from position 1. Column II gives corresponding results.
    Match the following : -


                                                    C  1 F

                                          2V             4V

                                               K

                                               1     2


                             Column I                                   Column II
     (a)    The net charge crossing the 4 volt cell in  C is     (p) 2
     (b)    The magnitude of work done by 4 Volt cell in (q) 6
             J is
     (c)    The gain in potential energy of capacitor in  J is   (r)   8
     (d)    The net heat produced in circuit in  J is            (s)   16
                                                                  (t)   None of these

                                     Space for rough work                        Page 19 of 20
                                                                             NFT-4_ PAPER-2
57) Magnetic flux (f) in a circular coil of resistance 10  changes with time as shown in
    figure.  direction indicates a direction perpendicular to paper inwards. Match
    the following table




                    Column I                               Column II
     (a)    At 1 s induced current is         (p) Clock wise
     (b)    At 5 s induced current is         (q) anticlockwise
     (c)    At 9 s induced current is         (r) zero
     (d)    At 15 s induced current is        (s) 2A
                                              (t) None




                                    Space for rough work                       Page 20 of 20

				
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