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A particular voltage is made up of two components: a 5 A and a cosine wave of peak value 7.8 A. The average value of voltage is _________

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A particular voltage is made up of two components: a 5 A and a cosine wave of peak value 7.8 A. The average value of voltage is _________

(a) Zero

(b) 35.14 A

(c) 78 A

(d) 5 A

The question was asked in semester exam.

The doubt is from Speed Control of Series Motor in chapter Speed Control of Direct Current Motors & Induction Motors of Electric Drives

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The correct answer is (d) 5 A

The best I can explain: Average value of DC voltage is 5 A. Average value of AC current is 0 A as it is alternating in nature. The average value of current is 5+0 = 5 A.

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