Question

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

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

Answer 1

Answer: (B), (C), (D)

The correct options are
B Most of the heat is generated in the filament
C The hot filament appears to glow
D 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.