02000EE201092001

PART ^
Answer any two full questions, each carries 10 marks.

12 In the circuit shown below, the switch was initially at position 1 and the steady (10)
state condition is reached. At t= 0, the switch is changed to position 2.
Determine (i) the current through the inductor i(t), (ii) voltage across the
inductor immediately after the switching operation and (iii) rate of decay of the

current at t = 1 second.

13 a) A resistor R and a IF capacitor is connected in series with a ‏0۷ذ‎ DC supply. (5)
Determine the value of the resistance R if the voltage across the capacitor
reaches 50% of its steady state value in 5 seconds.

b) Obtain the dotted equivalent circuit of the network shown in figure and then (5)

determine the net inductive reactance.

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