In the figure, suppose capacitor C is charged to 50 V with

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In the figure, suppose capacitor C is charged to 50 V with lower plate positive. Switch S is closed at t = 0. Current through the diode at t = 0 and final voltage across C are respectively

1. 25 A, 250 V
2. 25 A, 200 V
3. 20 A, 200 V
4. 15 A, 150 V

Correct Option: B

At t = 0, V_s = I_dR + V_C

I_d =	V_s - V_C
	R

=	200 - (-50)	= 25 A
	10

At t = 0, voltage across C, V_C = V_s = 200 V