How long will it take a 0.047 µF capacitor to completely discharge through a 10 kΩ resistor?
A)0.18 ms
B)0.47 ms
C)5 s
D)2.35 ms

Name: How long will it take a 0.047 µF capacitor to completely discharge through a 10 kΩ resistor? A)0.18 ms B)0.47 ms C)5 s D)2.35 ms
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Question

Quizplus · Accepted Answer

The time constant τ for an RC circuit is given by τ = R * C. Here, R = 10 kΩ and C = 0.047 µF. τ = 10,000 Ω * 0.047 * 10^-6 F = 0.00047 s or 0.47 ms. It takes about 5 time constants to discharge completely, so 5 * 0.47 ms = 2.35 ms.

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