The subsequent problems deal with the switched RC circuit below. Assume that the capacitor has no charge to begin with, and assume that VA and VB are constant dc voltages.
Immediately after the switch is closed (i.e., the circuit is not in steady state yet), what is the correct expression for VC, given the polarity shown?
A. VB
B. VB ? VA
C. 0
D. VA
E. VA ? VB
Answer: C
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