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Question

Which of the following uses the principle of electromagnetic induction?

A
Electric generator
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B
Water Cooler
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C
Solar Cell
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D
Electrical Battery
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Solution

The correct option is A Electric generator

The change in magnetic field lines associated with a coil is the cause of induced electric current in it. This is the principle of Electromagnetic induction. This change can be achieved by:
  • by moving the coil in a magnetic field or
  • by changing the magnetic field around the coil.

Electric generator uses this principle in which a coil rotates in a magnetic field such that the current is induced in it due to the change in magnetic field lines linked with it.

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