Electronics and Communication Engineering - Exam Questions Papers - Discussion

32. 

Values of iL, , VC and at t = 0 are given by,

[A]. 4 Amp, - 4 Amp/sec, 12 volts, - 4 volts/s
[B]. 4 Amp, 4 Amp/sec, -12 volts, - 12 volts/s
[C]. 6 Amp, - 2 Amp/sec, 0 volts, - 2 volts/sec
[D]. 6 Amp, 0 Amp/sec, - 2 volts, - 2 volts/sec

Answer: Option C

Explanation:

For t = 0 +

iL(0-) = = 6 A

VC(0-) = 0 V

For t = 0+

iL(0+) = 6

VC(0+) = 0

Apply KCL at node V

6 - V = (6 + v)2

6 - V = 12 + 2V

- 6 = 3V

V = VL = - 2V

At t = 0+, = -2

iL = 6 Amp

VC = 0 V

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