Question: Q. 5. (i) Define mutual inductance and write its S.I. unit.

(ii) Derive an expression for the mutual inductance of two long co-axial solenoids of same length wound one over the other.

(iii) In an experiment, two coils C1 and C2 are placed close to each other. Find out the expression for the emf induced the coil C1 due to a change in the current through the coil C2.

R U A [Delhi I, II, III 2015]

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Solution:

Ans.(i) (ii) Try yourself, Similar to Q. 2, Short Answer Type Questions-II

2

(iii) Let a magnetic flux be (ϕ1) linked with coil $\mathrm{C}{1}duetocurrent\left(I{2}\right)incoilC_{2}$.

We have :



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