# class-x-phy by hedongchenchen

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```									                           ARMY PUBLIC SCHOOL, KIRKEE

Subject: Physics

Class: X, Session: 2011-2012

CHAPTER: ELECTRICITY

APRIL 1 – MAY 7, JUNE 15 -JUNE 25, 2011, Number of periods: 20

Previous knowledge:

   Electric current
   Conductors and Insulators

Key Concepts:

   Electric Charge: Definition and standard unit of charge
   Coulomb’s Law
 Electric Current: Definition and standard unit current.
 Electric potential: Definition of potential and potential difference, standard unit
   Electric circuits
    Symbols of components like battery, voltmeter, ammeter, rheostat and switch
key
   circuit diagram
   use of Ammeter, voltmeter
   Ohm’s Law: statement of law, verification by experiment
   Resistance of a Conductor and factors on which it depends
   Resistivity
   Combination of Resistors – Series and Parallel
   derivation of equivalent resistance when a system of resistors is connected in
series and parallel
   Heating effect of Electric Current
   Joules Law of Heating
   Electric Energy
   Commercial Unit of Electric Energy
   Practical Applications of Heating Effect of Electric Energy
Learning Outcomes:
The learner will be able to

   state the nature and types of Electric Charges
   identify various types of Conductors , their properties and differentiate between
them
   verify the relation between Potential Difference, Current and Resistance and
their interdependence with formulae, units etc.
   state Mathematical formulation of Ohm’s Law and its numerical application
   define resistivity and state its dependent factors
   derive the relation for the effective resistance of resistors in series and parallel
    solve numerical sums based on resistances in series and parallel
   Give examples for the heating effect of Electrical Current
   state its causes, application and understand about the working of domestic
appliances
   derive Joules law of heating
   state the commercial unit of electric energy
   solve numerical sums based on heat, electric energy and electric power

Activity:

   Experiment to prove the Ohm’s Law
   Experiment to find the equivalent resistance of resistors when joined in series
and parallel

Type of Evaluation:

   Written test
   MCQ based on practical
   Test on Circuit diagrams
   Class work and homework
   Test on numericals
Sample Questions:

   Students will be asked to define various terms related to electricity with their units
   They may be asked to draw various components used in electric circuit and label them
   Numerical sums based on Ohm’s law and its application, resistors in series and parallel
   Numerical sums based on Electric energy, electric power and calculation of electric bill
   To explain the factors, principle of working of domestic appliances, advantages and
disadvantages of certain electric set ups and give reasons for situations asked
   Formulation of Electric energy, electric power and calculation of electric bill
   Safety devices being used and their types

Chapter: Magnetic Effects of Electricity

July 1 to Aug 20, 2011, Number of periods: 20

Previous knowledge:

   Magnets
   Properties of bar magnet
   Electricity

Key Concepts:

    Magnetic field
   Magnetic field lines
   Magnetic field due to current
   Magnetic field due to a current carrying straight wire and circular coil
   Magnetic field due to solenoid carrying current
    Right hand thumb rule
    Force on current carrying conductor placed in a magnetic field
    Fleming’s left hand rule
   Rotation of current carrying conductor in a magnetic field
   Electric motor
   Electromagnets
   Electromagnetic induction
   Induced potential difference, induced current
     Fleming’s right hand rule
    Electric generator
     Direct and alternating current
     Domestic circuit.
    Electric fuse
    Safety measures at home

Learning Outcomes:
The learner will be able to

   define magnetic field and field lines
   list the properties of magnetic field
   draw magnetic field lines around a bar magnet
   explain deflection in magnetic compass in the presence of bar magnet
   explain deflection in magnetic compass due to the Magnetic field created by
current carrying conductor
   draw magnetic field lines around a current carrying straight wire and circular coil
   define a solenoid
   draw magnetic field lines due to current in a solenoid
   state right hand thumb rule and find direction of field
   explain force on a current carrying conductor in a magnetic field
   state Fleming’s left hand rule and explain the application in electric motor
   explain the principle, construction and working of electric motor with figure
   define electro magnets and Electromagnetic induction
   state Fleming’s right hand rule and explain the application in electric generator
   define direct and alternating current
   compare and contrast AC and DC
   explain the principle, construction and working of electric generator with figure
   explain the need for safety measures like the electric fuse and earth wire at home.
.

Activity:

       Trace the magnetic field lines around a bar magnet using iron filings and a
magnetic compass needle

Type of Evaluation:

       Written test
       diagrams
       Class work and home work

Sample questions:
1.   Define magnetic field.
2.   List the properties of magnetic field
3.   Draw the magnetic field lines around a current carrying circular loop
4.   State Fleming’s right hand rule.
5.   Explain the principle, construction and working of electric motor with figure
6.   What is the function of split rings in an electric motor?
7.   Explain the principle, construction and working of electric generator with figure
8.   What are the functions of earth wire and fuse wire?

Chapter: Sources of energy

Aug 22 to September 6, 2011, Number of periods: 10

Previous knowledge:

     Renewable and non renewable sources of energy

Key Concepts:

       Source of energy: Qualities of a good source of energy, disadvantages of use of
fossil fuels, thermal and hydro power plants, problems associated with
construction of big dams.
       Improvements in technology: Bio-mass, Construction and working of biogas plants,
    Non-conventional sources of energy: Solar energy, construction and working of
solar cooker, solar cells, uses of solar cells.
    Energy from other sources: Tidal, wave and ocean thermal energy, geothermal
energy, nuclear energy.
     Environmental consequences of using nuclear energy, the need to look for
renewable energy sources

Learning Outcomes:
The learner will be able to

   list the characteristics of a good source of energy
   state the disadvantages of using fossil fuels
   explain the conventional sources of energy and their uses
   explain the working of bio gas plant, solar cookers, solar water heaters, windmills
   state the non conventional sources of energy
   explain the working of ocean thermal and geo thermal plants
   compare and contrast the various sources of energy
   understand the environmental consequences of using nuclear energy
   explain the need to look for renewable energy sources

Type of Evaluation:

 written test

Sample questions:
1.   Write any two characteristics of a good fuel.
2.   What are the disadvantages of fossil fuels?