# Emf Induced in a Generator Coil

## Description

Electric generators induce an emf by rotating a coil in a magnetic field. Electromotive force, also called Emf, is the voltage developed by any source of electrical energy. In the case of an electrical generator, a time-varying magnetic field inside the generator creates an electric field via electromagnetic induction, which in turn creates an energy difference between generator terminals.The emf induced in a generator coil of N turns rotating in a uniform magnetic field, is related to the area of the loop of the coil and the magnetic field.

Related formulas## Variables

ϵ | Electromotive force (V) |

N | Number of turns (dimensionless) |

A | Area of a loop (m^{2}) |

B | Magnetic field strength (T) |

Δ_{t} | Time (sec) |

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