If a charge in current of 0.01 A in one coil produces a change in magnetic flux

If a charge in current of 0.01 A in one coil produces a change in magnetic flux of 1.2 x 10⁻² Wb in the outer coil, then the mutual inductance of the coils in henry is

Options

(a) 0
(b) 1.2
(c) 3
(d) 1.5

Correct Answer:

1.2

Explanation:

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  • Magenetic flux=LXdI/dt
    flux=2 x 10^(-2)
    current flown in 1 sec is 0.001 amppere
    ie,dI/dt = 0.01A
    =>2 x 10^(-2) = L x 0.001
    =>L = 2 x 10^(-2)/0.001
    =>L = 2H

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