The subsequent problems deal with the circuit shown below. Assume that the diode is ideal (i.e., has a 0V forward bias voltage).
If VA=5V and VB=2V, and there is a switch that turns on both voltage sources at the same time, and there is no charge on the capacitor initially, what is current I immediately after the switch is closed (i.e., the circuit is not in steady state yet)?
A. 1/5 mA
B. 5 mA
C. 0
D. 1/3 mA
E. 3 mA
Answer: B
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