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The average value of current i=I(m) sin ...

The average value of current `i=I_(m) sin omega t from t=(pi)/(2 omega )` to `t=(3 pi)/(2 omega)` si how many times of `(I_m)`?

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`gt i lt =(int_(pi//2 omega)^(3pi//2omega) I_(m) sin omega t dt)/((3 pi)/(2omega)-(pi)/(2 omega)) = (I_(m)(-(cos omegat)/(omega))_(pi//2omega)^(3 pi//2omega))/((pi)/(omega))=0`.
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