Here, Φ is the magnetic flux of the vector field B across the circuit, and it is a measure of how much magnetic field passes through the circuit. The electromotive force is expressed in terms of volts and is denoted by the formula for the Law of Induction by Faraday: The flux quantifies how much the magnetic field crosses the circuit. The magnitude of this electromotive force is equal to the rate at which the magnetic field flux changes through the circuit. He found that:Īn electromotive force is induced in a circuit by the changing magnetic field in it In 1831, Faraday discovered the phenomenon of magnetic induction, which is one of the greatest milestones in the process of understanding nature at a fundamental level. The SI and CGS unit of magnetic flux density is represented by the table given below: SI unit Also, the magnetic flux density is a vector quantity. Tesla (T) is the unit of magnetic flux density or B.
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