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A current of 10 A in primary of a circuit is reduced to zero at a unifrom rate in `10^(-3)`s. If coeff.of mutual inductance is 3 H, what is the induced e.m.f. in the secondary ? |
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Answer» Here, `I_(1) = 10 A, I_(2) = 0, dt = 10^(-3) s, M = 3 H, e = ?` As `e = - M (d I)/(dt) = (- M (I_(2) - I_(1)))/(dt) :.e = (-3(0 - 10))/(10^(-3)) = 3 xx 10^(4) V` |
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