R - L SERIES CIRCUIT TRANSIENTS

							                    SEE 2742

        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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