What is the peak value of a sinusoidal alternating current

Posted on 2014-02-04 11:14:00 in Engineering by SMITH _SSS

(i) What is the peak value of a sinusoidal alternating current of 4.78 r.m.s. amperes?

(ii) What is the r.m.s. value of a rectangular voltage wave with an amplitude of 9.87 rolts ?

(iii) What is the average value over half a cycle of sinusoidal alternating current whose maximum value is 31 A?

(iv) An alternating current is represented by i = 70.7 sin 520 t. Determine (a) the frequency (b) the current 0.0015 second after passing through zero and increasing positively.

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