Filament of a torch bulb is (a) a metal case (b) metal tip at the centre of the base (c) two thick wires (d) a thin wire

d) Thin wires


A filament of a bulb is spirally wounded wire inside the bulb supported by two thick wires at its ends. The filament is wire, which is mostly made up of tungsten. As electric current passes through the filament, it glows to produce light.A light bulb is a device that produces light from electricity. Light bulbs turn the electricity to light by sending current through a thin wire called filament. The filament is usually made of tungsten, a material that emits light when electricity is passed through it.

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