Question

Some of the polar crystals when heated produces small electrical current. This phenomenon is called ______.

विकल्प

• Ferro electricity 

• Pyroelectricity 

• Piezoelectricity 

• Anti-ferro electricity

Answer 1

Some of the polar crystals when heated produces small electrical current. This phenomenon is called Pyroelectricity.

Explanation:

When some of the polar crystals are heated, a little electrical current is produced. This occurrence is known as pyroelectricity.