Question

State three characteristics of material which makes it useful for making heating elements of electric devices.

Answer 1

1. Three characteristics of the material which make it useful for making heating elements of electric devices are explained below.
   1. The material of the element should have a high melting point so that it does not melt at a high temperature.
   2. The resistivity of the element should be very high so that more and more heat is generated.
   3. The temperature coefficient of resistance should be very low so that it heats gradually and up to a high temperature.