Question

The temperature coefficient of resistance α has a _________ value for metals and ________ value for dielectric and insulator.​

Answer 1

Answer:

positive for metals , negative for insulator.

Answer 2

The temperature coefficient of resistance α has a positive value for metals and negative value for dielectric and insulator.

Explanation:

• Metals when we increase the temperature, the relative movement of the atoms as well the free electrons increase.
• Because of which there is more collisions and more loss of energy.
• Due to which the resistance increases and it gives a positive temperature coefficient of resistance for metals.