Electromagnetic Induction - Electrical C & V


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27 March 2020

Electromagnetic Induction

Electromagnetic Induction

The phenomenon of voltage or electromotive force being produced in an electrical conductor due to change in magnetic field is called Electromagnetic Induction. Electromagnetic induction was discovered by Michael Faraday in the 1830s. Many electrical devices operate based on the principle of electromagnetic induction.

Electromagnetic induction can be generated in two ways, first when placing an electric conductor in a moving magnetic field and in the second way by placing a moving electric conductor in a constant magnetic field. The phenomenon of electromagnetic induction was first discovered by Michael Faraday. He noticed a change in the voltage of the circuit when he placed the moving electric conductor in a magnetic field. He later estimated factors such as the number of coils, the strength of the magnet, the changing magnetic field, the motion between the coil and the magnet, etc. that may affect electromagnetic induction.

The voltage generated is proportional to the turns of the coils. In other words, the more turns in the coils, the more voltage will be generated. The changing magnetic field also affects the voltage. The speed between the coil and the magnet also affects the electromagnetic induction. The higher the speed, the more voltage will be generated.

Equation of Electromagnetic Induction:

e = N × dΦdt

Over here,
e = voltage induced (measured in volts) - voltage generated
t = time (measured in seconds)
N = number of turns in the coil
Φ = magnetic flux (measured in weber)

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