A student takes about one metre long insulated copper wire and winds it round and round closely on a large iron nail. He then connects the two ends of the wire to a battery. When a steel paper clip is brought near the iron nail, the iron nail attracts it due to which the steel clip sticks to the iron nail.
(a) Which effect of electric current is demonstrated by this experiment?
(b) Name one common appliance used in our houses which works on this effect of electric current.

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Solution

(a) Magnetic effect of current is demonstrated in the experiment. This effect can be described as when an electric current is passed through a conductor it produces a magnetic field around it.

(b) An electric motor works on the magnetic effect of the electric current. It converts electrical energy into mechanical energy.

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