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  4. If a change in current of 0.01 A in one coil produces a change in magnetic flux of 2 × 10-2 Weber in another coil, 'then the mutual inductance between coils is·

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Q. If a change in current of $0.01\, A$ in one coil produces a change in magnetic flux of $2 \times 10^{-2}$ Weber in another coil, 'then the mutual inductance between coils is·

COMEDKCOMEDK 2014Electromagnetic Induction

Solution:

Here,
$\phi_B = 2 \times 10^{-2} \, Wb , I = 0.01 A$
As $\phi_B = MI$
$\therefore $ Mutual inductance between two coils is
$M = \frac{\phi_{B}}{I} \frac{ 2\times10^{-2}Wb}{0.01 A} = 2H$