Extra exam question E5B01
Subelement E5, ELECTRICAL PRINCIPLES· Group E5B
What is the term for the time required for the capacitor in an RC circuit to be charged to 63.2% of the applied voltage or to discharge to 36.8% of its initial voltage?
- A.An exponential rate of one
- B.One time constant (correct answer)
- C.One exponential period
- D.A time factor of one
WhyOne time constant is the time it takes a capacitor in an RC circuit to charge to 63.2% of the applied voltage, or discharge to 36.8% of its initial voltage. The time it takes a capacitor in an RC circuit to charge to 63.2% of the applied voltage, or to discharge to 36.8% of its initial voltage, is called one time constant, the standard unit used to describe RC charging and discharging behavior, answer B. "Exponential rate of one," "exponential period," and "time factor of one" aren't the actual terminology used for this quantity.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2024-2028 NCVEC Element 4 pool (public domain); the explanation above is original writing, see our methodology.
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