Question

The filament of a bulb is usually a:

• A. thin wire with many coils
• B. thick wire with many coils
• C. thin straight wire
• D. thick straight wire

Answer 1

The correct option is A thin wire with many coils

When electric current goes through the filament, the filament glows. It may also be known as the electron emitting element in a vacuum tube. To make the bulb produce more light,the filament is usually made of coils of thin wire, also known as the coiled coil in order to get more emmision.

Generally, Filaments in incandescent light bulbs are made of tungsten as its melting point is very high.

Therefore, A is correct option.