# R - L SERIES CIRCUIT TRANSIENTS by zlt20671

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FAKULTI KEJURUTERAAN ELEKTRIK
UNIVERSITI TEKNOLOGI MALAYSIA
KAMPUS SKUDAI
JOHOR

ELECTROTECHNIC LABORATORY

R – L SERIES CIRCUIT TRANSIENTS
(Experiment 2)
(LABORATORY SHORT REPORT)

NAME                : __________________________

SECTION/GROUP       : __________________________

SUBMISSIONS DATE    : ________________________

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EXPERIMENT                : 2

TITLE                     : R- L SERIES CIRCUIT TRANSIENTS

Results, calculations and exercises for R-L circuit

i.      Calculate the instantaneous currents for each voltage recorded using equations (v)
and (vi) as shown below.

Value of instant voltage during rise time
Increase Instant Current =                                               (v)
Value of resistance

Value of instant voltage during decay time
Decreasing Instant Current =                                                          (vi)
Value of resistance

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ii.   Using the current equations i.e. equations (i) and (ii) calculate the theoretical
instantaneous current values when t = L/R, t = 2(L/R) and t = 3(L/R) for the
exponentially increase and an exponentially decay currents.

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iii.    Record your results obtained from (i) and (ii) in Table 1.0.

Table.1.0

Experiment                                Theory
Iinc =      Idec =
R(Ohm)           Time,t VR,inc       VR,dec          VR,inc/R    VR,dec/R      Itheory,inc   Itheory,dec
(ms)   (V)          (V)             (A)         (A)           (A)           (A)

4000

6000

8000

10000

inc: increase
dec: decrease

iv.     Compare the theoretical and the observed current values. Discuss your
observation.

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v.   Sketch the waveform obtained for the different values of resistance (4000 ohm, 6000
ohm, 8000 ohm and 10000 ohm) below.

LIST OF REFERENCES (List at least two references used in this experiment)

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