Relative position of two coils $$1$$ and $$2$$ is fixed. Coil $$1$$ is carrying no current and when the current in coil $$2$$ is increasing at a constant rate of $$10$$ $$A/S$$, the emf induced in coil $$1$$ is $$20$$ mV. Find the magnetic flux linked with coil $$2$$, which is not carrying any current, when coil $$1$$ is carrying a current of $$10$$ A.

Question

Infinity Learn · Accepted Answer

If M be the coefficient of mutual inductance then ε$$12=$$−$$Mdl2dt$$⇒$$20$$×$$10$$−$$3=M$$×$$10$$⇒$$M=2$$×$$10$$−$$3H$$∴ ϕ$$21=Mi1=2$$×$$10$$−$$3$$×$$10$$ weber $$=$$ $$0.02$$ weber

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