Transient Response in R-C and R-L Circuits

LAB 3: TRANSIENT RESPONSE IN R-C AND R-L CIRCUITS
OBJECTIVES:
1. To lose it the transient repartees of R-C and R-L circuits.
2. To analyse the potency and current responses due to a step change in voltage applied to an R-C or
R-L circuit.
range THEORY:
In an R-C circuit, the response curve for the voltage
across the capacity (Vc) will be
( ) 1 1
t t
RC
c s s V t V e V e ?
? ? ? ? ? ?
? ? ? ? ? ? ? ?
? ? ? ?
and the current flow to the capacitor ic will be
0 0 0 ( ) ;
t t
RC s
c
V
i t I e I e where I
R
?
? ?
? ? ?
and the date constant, ??= RC.
In an R-L circuit, the response curve for the current
through the inductor will be
1 1
Rt t
s L s
L
V V
i e e
R R
?
? ? ? ? ? ?
? ? ? ? ? ? ? ?
? ? ? ?
and the voltage across the inductor will be
( )
Rt t
L
L s s V t V e V e ?
? ?
? ?
and the time constant, ? =L/R.
* Note the formulae above are for exaltation capacitors and inductors. The internal resistance in a real
capacitor or a real inductor could have some essence on the time constants in the circuits.
EQUIPMENT AND MATERIALS LIST
Signal Generator.
Breadboard or any suitable connection board.
*Fixed Resistors 100 k?, 1 k??(220 k??
*Fixed Capacitor 0.



01 ?F (33nF)
*Fixed Inductor 10 mH
Oscilloscope
Digital Multimeter
Digital LCR Meter
* any other suitable values may do.
Electrical engine room Laboratories Version 2008 Edited 2012 2
CIRCUIT DIAGRAMS fancy 1 Figure 2
PROCEDURE 1 (a) Construct the circuit of Figure 1 using the equipment and materials provided. However, first measure the value of R and C with the Digital multimeter and LCR meter, respectively. (b) Display one complete cycle (approx. 10 div) of a 100 Hz square wave on Channel 2 of the oscilloscope by following these move: 1) Turn selector to square wave on the call for generator. 2) Set oscillator to 100 Hz. 3) Set horizontal sweep time on oscilloscope to 1 ms/div. 4) Set vertical gain to 1 volt/div. 5) Change the output of manoeuvre generator to get 6...If you want to get a wax essay, order it on our website: Orderessay



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