Question

A bulb B and an inductor are connected in series to the ac mains. The bulb glows with some brightness. How will the glow of the bulb change when a bismuth core is introduced inside the inductor ??Give reason.

Answer 1

Dear Student,

The permeability of bismuth is very low as we insert the bismuth the the inductance of the circuit becomes small as the inductance is directly proportional to permeability. so if inductance will be small current will increase in the circuit and bulb will glow brighter.

Regards