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Compute the mutual inductance for a given pair of coils if increase in current from 2 A to 6 A in 0.1 s in one coil causes an induced e.m.f. of 1 V in the order coil. |
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Answer» Here, `A = 8 xx 2 = 16 sq cm = 16 xx 10^(-4) m^(-2)` `(dB)/(dt) = - 0.02 Ts^(-1)` Induced e.m.f. `e = (- d phi)/(dt) = - (A dB)/(dt)` ` = - 16 xx 10^(-4) (- 0.02) = 32 xx 10^(-6) V` Power loss `= (e^(2))/(R ) = ((32 xx 10^(-6))^(2))/(1.6)` `= 6.4 xx 10^(-10) W` |
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