Question

Which of the following is true about the filament of an electric bulb?

• A. Most of the heat is generated in the filament
• B. The hot filament appears to glow
• C. The filament is made up of a material with high melting point.
• D. The filament is made up of a material with low melting point.

Answer 1

Answer: (A), (B), (C)

The filament is made up of a material with high melting point.

Filaments in electric bulbs are made up of a material called tungsten which has a very high melting point. Whenever electric current passes through the filament, it heats up and the hot filament glows.