A direct current of 10A is superimposed on an alternating current I=40cosWt(A) flowing through a wire.the effective value of the resultanting current will be
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effective value if current= (10² + 40²/2)½
= (100+800)½
= √900
= 30 Amp.
= (100+800)½
= √900
= 30 Amp.
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