Question:
What do you understand by electromagnetic induction? State Faraday’s laws regarding electromagnetic induction.
What do you understand by electromagnetic induction? State Faraday’s laws regarding electromagnetic induction.
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Electromagnetic induction is the basic working principle behind generators, transformers, and many electrical machines.
Updated On: Oct 8, 2025
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Solution and Explanation
Electromagnetic Induction:
Electromagnetic induction is the process of generating an electromotive force (emf) or current in a conductor when the magnetic flux linked with it changes. This phenomenon was discovered by Michael Faraday in 1831. Faraday's Laws of Electromagnetic Induction:
First Law:
Whenever the magnetic flux through a circuit changes, an emf is induced in the circuit. If the circuit is closed, a current is also induced.
Second Law:
The magnitude of the induced emf is directly proportional to the rate of change of magnetic flux through the circuit. \[ \text{Induced emf} (\varepsilon) = -\frac{d\Phi}{dt} \] Where:
\(\Phi\) is the magnetic flux,
\(\frac{d\Phi}{dt}\) is the rate of change of magnetic flux,
The negative sign indicates the direction of induced emf (Lenz's Law).
Electromagnetic induction is the process of generating an electromotive force (emf) or current in a conductor when the magnetic flux linked with it changes. This phenomenon was discovered by Michael Faraday in 1831. Faraday's Laws of Electromagnetic Induction:
First Law:
Whenever the magnetic flux through a circuit changes, an emf is induced in the circuit. If the circuit is closed, a current is also induced.
Second Law:
The magnitude of the induced emf is directly proportional to the rate of change of magnetic flux through the circuit. \[ \text{Induced emf} (\varepsilon) = -\frac{d\Phi}{dt} \] Where:
\(\Phi\) is the magnetic flux,
\(\frac{d\Phi}{dt}\) is the rate of change of magnetic flux,
The negative sign indicates the direction of induced emf (Lenz's Law).
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