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  4. The current passing through a choke coil of 15 henry is decreasing at the rate of 0.2 ampere per second. The e.m.f. developed across the coil :

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Q. The current passing through a choke coil of 15 henry is decreasing at the rate of 0.2 ampere per second. The e.m.f. developed across the coil :

Electromagnetic Induction

Solution:

$E = L \frac{dI}{dt}$, Here L = 15 H and $\frac{dI}{dt} $ = 0.2 A$s^{-1}$ this gives E = 3V