Which of the following devices is based on the phenomenon of electromagnetic induction?

The correct answer is Generator.

Key Points

• Electromagnetic induction
  • It was first discovered by Faraday’s, therefore, it is also known as Faraday’s laws of electromagnetic induction.
  • We know, the generator basic principle of operation, is electromagnetic induction. Hence, Option 3 is correct.
  • When a change in flux linkages is changed, an emf or voltage is induced, thus we get voltage and hence current as our output which is desired for generators.
  • We know, in generators, the input is mechanical and the output is electrical.
  • So, with this change in the magnetic field, we get an induced emf and hence current.
  • The mechanical force is used to bring in the changes in magnetic flux which in turn produces electricity.