# State the Principle of an Electric Generator

Electric generators, also referred to as dynamos, are machines that convert mechanical energy into electrical energy. Steam turbines, gas turbines, and wind turbines are the most common sources of mechanical energy for electric generators. Electrical generators provide virtually all the energy required by electric power grids.

## Working Principle of Electric Generator

The electric generator works on the principle of electromagnetic induction. Electricity is generated by rotating a coil inside a magnetic field.

Electric generators work on the principle of electromagnetic induction. A conductor coil (a copper coil tightly wound onto a metal core) is rotated rapidly between the poles of a horseshoe type magnet. The conductor coil along with its core is known as an armature. The armature is connected to a shaft of a mechanical energy source such as a motor and rotated. The mechanical energy required can be provided by engines operating on fuels such as diesel, petrol, natural gas, etc. or via renewable energy sources. When the coil rotates, it cuts the magnetic field which lies between the two poles of the magnet. The magnetic field will interfere with the electrons in the conductor to induce a flow of electric current inside it.

### Definition of Electromagnetic Induction

Electromagnetic induction is defined as the process in which the conductor is placed between the changing magnetic field. The voltage will be induced when the intensity of the magnetic field either increases or decreases such that the conductor is perpendicular.