The time constant of the capacitance circuit is defined as the time during which voltage________?
Correct answer: C. rises to 63.2% of its final steady value
- A. falls to 36.8% of its final steady value
- B. rises to 38.6% of its final steady value
- C. rises to 63.2% of its final steady value
- D. none of the above
Explanation
For capacitor charging, one time constant changes the voltage to 1 - e^-1, or about 63.2%, of its final value. During discharge, the voltage falls to 36.8% after one time constant, which is the common distractor here.
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