Question: Problem 4. The current in an a.c. circuit at any time t seconds is given by: i = 120 sin(100nt + 0.36) amperes. Find:

Problem 4. The current in an a.c. circuit at any time t

Problem 4. The current in an a.c. circuit at any time t seconds is given by: i = 120 sin(100nt + 0.36) amperes. Find: (a) the peak value, the periodic time, the frequency and phase angle relative to 120 sin 100nt (b) the value of the current when t = 0 (c) the value of the current when t = 8 ms (d) the time when the current first reaches 60 A, and (e) the time when the current is first a maximum

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