Consider the following statements: At the present level of technology available in India, solar energy can be conveniently used to1. Supply hot water to residential buildings.2. Supply water for minor irrigation projects.3. Provide street lighting.4. Electrify a cluster of villages and small towns.

Electromagnetism is an interaction that occurs between particles with electric charge via electromagnetic fields. The electromagnetic force is one of the four fundamental forces of nature. It is the dominant force in the interactions of atoms and molecules.