Explain in short about electromagnetic force.

Explanation

`to` Electromagnetic force is the force between charged particles.
`to` In the simpler case when charges are at rest, the force is given by Coulomb.s law.
`to` Attractive for unlike charges and repulsive for like charges.
`to` Charges in motion produce magnetic effects and a magnetic field gives rise to a force on a moving charge.
`to` Electric and magnetic effects are in general, inseparable hence the name electromagnetic force.
`to` Electromagnetic force acts over large distances.
`to` It does not need any intervening medium.
`to` It is enormously strong compared to gravity.
`to` The electric force between two protons is 1036 times the gravitational force between them for any fixed distance.
`to` Since the electromagnetic force is so much stronger than the gravitational force, it dominates all phenomena at atomic and molecular scales.
`to` Thus, it is mainly the electromagnetic force that governs the structure of atoms and molecules the dynamics of chemical reactions and the mechanical, thermal and other properties of materials.
`to` It underlies the macroscopic forces like .tension., .fiction., .normal force. , .spring force. etc.