The mathematical expression for the instantaneous value of an alternating current is i = 7.071 sin (157.08 t – 4) A. Find its effective value, periodic time and the instant at which it reaches its positive maximum value. Sketch the wave – form from t = 0 over one complete cycle.

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The mathematical expression for the instantaneous value of an alternating current is
i = 7.071 sin (157.08 t – ) A. Find its effective value, periodic time and the instant at
which it reaches its positive maximum value. Sketch the wave - form from t = 0 over
one complete cycle.
Transcribed Image Text:The mathematical expression for the instantaneous value of an alternating current is i = 7.071 sin (157.08 t – ) A. Find its effective value, periodic time and the instant at which it reaches its positive maximum value. Sketch the wave - form from t = 0 over one complete cycle.
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