Two circular coils A and B are placed closed to each other. If the current in the coil A is changed, will some current be induced in coil B? Give reason.

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Solution

It is because when the current in your coil A is successfully changed, then the magnetic field linked with it also changes. Hence, the overall magnetic field around the coil B also alters. This kind of change in the magnetic field the lines around coil B actually induces the electric current in this field.
It is known as electromagnetic induction.

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