The branch of science that covers the comprehensive study of electricity and magnetism is known as $.........$.

Why is pure iron not used for making permanent magnets? Name one material used for making permanent magnets. Describe how permanent magnets are made electrically. State two examples of electrical instruments made by using permanent magnets.

In order to find the force experienced by a current-carrying conductor,we can use Maxwell's corkscrew rule.

The laws of electromagnetism tell us that energy can be transferred from one object to another:

What is meant by overloading of an electrical circuit? Explain two possible causes due to which overloading may occur in a household circuit. Explain one precaution that should be taken to avoid the overloading of a domestic electric circuit.

Why is the metallic body of electrical devices connected to the earth wire?