Question

2. A sinusoidal alternating voltage has an r.m.s. value of 200 V and a frequency of 50 Hz. It crosses the zero axis in a positive direction when t = 0

Determine (i) the time when voltage first reaches the instantaneous value of 200 V and (ii) The time when voltage after passing through its maximum positive value reaches the value of 141.4 V.

Answer 1

$$t_1=2.5\ ms\\t_2=3.3\ ms$$