Question

According to Faraday’s law of electromagnetic induction an emf is induced in a coil if:
A. Electric flux links with the coil
B. Magnetic flux links with the coil
C. Magnetic flux linked with the coil changes.
D. Electric flux linked with the coil changes.

Answer 1

Hint:-When an electric circuit or coil is introduced in a magnetic field there is a current induced in the coil. Explain about electromagnetic induction and state the correct answer explaining about the process involved.

Complete step-by-step solution:-
Faraday law states that a current will be induced in the conductor when it is exposed to a magnetic field which is changing. This is known as electromagnetic induction.
$E = \dfrac{{d\phi }}{{dt}}$ ;
Where:
E = Electromotive force.
$\phi $= magnetic flux.
t = time.
Here the equation is stating that the electromotive force is a change in magnetic flux with respect to time. Here the change in electric flux linked with the coil won’t coil will not produce an emf, also electric flux which is not changing with time and is just attached to the coil will not produce electric flux. Similarly, magnetic flux which is not changing with time and is just linked with the coil won’t produce an emf, this is so because according to the formula there has to be a change in the magnetic flux associated with the coil with respect to time to produce an EMF.
Final Answer: Option “3” is correct. According to Faraday’s law of electromagnetic induction an emf is induced in a coil if the magnetic flux linked with the coil changes.

Note:- State and explain about the electromagnetic induction and write its formula. Also, make sure to explain each option as to why that particular option is not the correct option. Link each option with the formula for emf and choose the correct option.