1.

Two circular coils P & Q are kept close to each other, of which coil P carries a current. If coil P is moved towards Q, then will some current be induced in coil Q? Give reasons for your answer and name the phenomenon involved. What happens, if coil P is moved away from Q? Mention a method of inducing current in a coil.

Answer»

When coil P is moved towards Q then current will be induced in coil Q. This is because on moving P the magnetic field associated with Q increases and so

Current is induced:

(i) The phenomenon involved is electromagnetic induction. If ‘P’ is moved away from Q, then the field associated with a will decrease and a current will be induced but in the opposite direction.

(ii) Electric current in a coil can be induced by moving a magnet towards or away from the coil.



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