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  4. Two identical circular coils A and B are kept on a horizontal tube side by side without touching each other. If the current in the coil A increases with time, in response, the coil B

Q. Two identical circular coils and are kept on a horizontal tube side by side without touching each other. If the current in the coil increases with time, in response, the coil

 2659  196 KCETKCET 2013Electromagnetic Induction Report Error

Solution:

Two identical circular coils A and B are kept on a horizontal tube side by side without touching each other. If the current in the coil A increases with time, in response, the coil B is repelled. It is so because when the current in coil A is changed, the magnetic field associated with it also changes. As a result, the magnetic field around coil B also changes. This change in magnetic field lines around coil B induces an electric current in it.Now as the same current is flowing in both the coils and in same direction, hence they both will repel each other.