Question

Define magnetic effect of electric current with suitable activity

Answer 1

The magnetic effect of current was discovered by oersted in 1820.

A current flowing in a wire always gives rise to a magnetic field around it.

Experiment to demonstrate the magnetic effect of current:The deflection of compass needle by the current carrying wire in the above experiment shows that an electric current produces a magnetic field around it.

Answer 2

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• An electromagnet consists of a long coil of insulated copper wire wound around an iron rod. When the two ends of the coil are connected to a cell, a current passes through the coil and produces a magnetic effect. This magnetic effect magnetises the iron rod. So, the iron rod becomes an electromagnet