After two time constants on the de-energizing transient, the voltage across the inductor has changed by
%, leaving % remaining.
A) 63.2, 36.8
B) 76.7, 23.3
C) 13.5, 86.5
D) 86.5, 13.5

Question

Quizplus · Accepted Answer

After two time constants, the voltage across an inductor in a de-energizing transient has decreased to about 13.5% of its initial value, meaning 86.5% of the voltage has changed.

After Two Time Constants on the De-Energizing Transient, the Voltage