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MCQ Practice Question

A charged capacitor discharges through a resistor. After one time constant, its voltage is approximately what fraction of its initial value?

A0.368
B0.5
C0.632
D0.865

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Correct Answer: A. 0.368

Explanation: For natural RC discharge, vc(t)=V0e^(-t/tau). At t=tau, vc≈0.368V0.

Reference: Standard network theory: transient analysis

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