How long will it take a 0.047 µF capacitor to fully charge through a 100 kΩ resistor?

Name: How long will it take a 0.047 µF capacitor to fully charge through a 100 kΩ resistor?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

The time constant τ for an RC circuit is given by τ = R * C. Here, R = 100 kΩ and C = 0.047 µF. So, τ = 100,000 * 0.000000047 = 0.0047 seconds or 4.7 ms. A capacitor is considered fully charged after about 5 time constants, so 5 * 4.7 ms = 23.5 ms.

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