Which of the following electrical devices works on the principle of electro-magnetic induction ?

Electric bulb

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Electric fan.

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Electric cooker

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L.E.D.

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Solution

The correct option is B Electric fan.
Electric fan works on the principle of electro - magnetic induction. An electric fan works with the help of an electric motor the electric motor consists of a coil of wire wound around a metallic core. As electric current passes through the coil of wires, it produces rotational motion due to electro - magnetic induction.

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