Question

What do you mean by magnetic flux? Write its unit. State Faraday's law of electromagnetic induction.

Accepted Answer

Magnetic flux is defined as the number of magnetic field lines passing through a given closed surface. It provides the measurement of the total magnetic field that passes through a given surface area. Here, the area under consideration can be of any size and under any orientation with respect to the direction of the magnetic field. SI unit of magnetic flux is the $Weber (Wb)$ .

Faraday’s law is the basic law of electromagnetism predicting how a magnetic field will interact with an electric circuit to produce an electromagnetism (EMF) this phenomenon known as electromagnetic induction.
Faraday’s law of electromagnetic induction

First law-

Faraday’s first law of electromagnetic induction states that whenever the flux of magnetic field through the area bounded by a closed loop changes, an emf is produced in the loop.

The flux may be changed in a number of ways. In any case, as long as the flux keeps changing, the emf is present. And that produced emf drives an electric current through the loop.

Second law –
Faraday’s second law of electromagnetic induction states that the magnitude of induced emf is directly proportional to the time rate of change in magnetic flux linked with the circuit.

The emf is given by

$ε \propto \frac{dϕ}{dt}$

$ε = - \frac{dϕ}{dt}$

Where, $ϕ$ is the flux of magnetic fields through the area.

Hence, it is the required answer.

What do you mean by magnetic flux? Write its unit. State Faraday's law of electromagnetic induction.

Important Questions on Electromagnetic Induction

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