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A lamp in a circuit consisting of a coi...

A lamp in a circuit consisting of a coil of large number of truns and a battery does not ligth upto full brilliance instantly on switching on the circuit ?

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When the circuit is switched on. Current increase through the lamp and also through the coil. An induced e.m.f. developes in the coil which oppose the growth of current. As the current takes time to maximum value, the lamp does not light instantly upto full brilliance.
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