Question

State whether the following statement is true or false:

An electric generator works on the principle of electromagnetic induction.

• A. True
• B. False

Answer 1

The correct option is A True

Electromagnetic Induction:

1. Electromagnetic induction is a current which is produced when an EMF is induced due to changing magnetic field.
2. According to the Faraday's principle of electromagnetic induction, “The EMF induced in a loop by the changing magnetic flux $\varphi$ is equal to the rate of change of magnetic flux.” Mathematically it is stated by, $EMF=\frac{d\varphi }{dt}$.
3. Hence, when a coil in a magnetic field is rotated, the magnetic flux changes and EMF is induced and therefore current flows.

Electric generator:

1. An electric generator works on the principle of electromagnetic induction.
2. When the coil is rotated by external mechanical forces in a magnetic field, the magnetic flux through the coil changes.
3. This creates an induced EMF in the coil and hence induced current flows.

Hence, this statement is true.