Question

Why is the coil of a heating element of a heater made from a metal?

Answer 1

Because some metals offer high resistance to electricity. When electricity is passed though the heating coil, due to it's high resistance it heats up and hence, acts as a heating filament. A similar thing happens in those old 60-watt light bulbs. The tungsten filament in it resists the electric current, and produces light, and also heat.

Answer 2

the coil of a heating element of a heater made from a metal because metal can conduct electricity and it does not melt under high temperature etc

the heating element of a heater will be durable 


heating element of a heater  are mainly made up  of alloys which are made by mixing of metals which have little high resistance than metals so heating becomes faster