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A system S consists of two coils A and B. The coil, A carries a steady current I. While the coil B is suspended nearby as shown in figure. Now, if the system is heated, so as to raise the temperature of two coils steadily, then A. the two coils shows attractionB. the two coils shows repulsionC. there is no change in the position of the two coilsD. induced current are not possible in coil B |
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Answer» Correct Answer - A Coil A carries a steady current with increase in temperature, its resistance increases and so current is decreasing at a constant rate, this induces an emf in B which oppose this change i.e., current in coil B is in same direction of A, therefore they attract to each other. |
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