In order for a circuit to respond quickly, its time constant should be short. In a circuit involving resistance and capacitance, which of the following choices would result in the shortest time constant?
a. R = 75 W, C = 75 mF
c. R = 300 W, C = 75 mF
b. R = 200 W, C = 200 mF
d. R = 100 W, C = 30 mF
D
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