Question

An incandescent bulb works on the principle of incandescence, a general term meaning light produced by heat. An electric current is passed through a thin metal filament, heating the filament until it glows and produces light. Which pair of characters makes tungsten as a suitable element for incandescent bulb?​

Answer 1

The high resistivity and high melting point make tungsten a suitable element for the incandescent bulb.

Explanation:

• The tungsten filament used in incandescent bulbs has a very high melting point and can reach a temperature of nearly $4500$° Fahrenheit.
• The glass surrounding the filament creates a vacuum and prevents oxygen in the air from reaching the hot filament.
• Without this glass covering, the filament would overheat and oxidize in a matter of seconds.
• This pair of characters such as high melting point with high resistivity makes tungsten a suitable element for the incandescent bulb.