Question

An alternating current of frequency 50 Hz has a peak value of 100A. The expression for instantaneous value of
current and the time to reach 90A for the first time are
and respectively.
A. 70.71 sin314t, 3.56ms
B. 100 sin 314t, 3.56ms
C. 100sin 157t ,7.13ms
D. 70.71 sin 157t, 7.13ms​

Answer 1

Answer:

so the answer must be 2nd option