Answer :

(a)The bulb in (a) glows brightly.

(b) The bulb in (b) glows brightly. There is no change in intensity as the power supply is DC. So, inductance has no role to play.

(c) The intensity of light reduces. The coiled wire behaves as an inductor and a back emf is generated. This reduces the effective voltage of the circuit.

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<span lang="EN-USKerala Board Physics Part I