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Standard X
Physics
Electromagnetic Induction
Question

Which of the following electrical devices works on the principle of electro-magnetic induction ?
  1. Electric fan
  2. Electric bulb
  3. Electric cooker
  4. L.E.D.

A
Electric fan
B
Electric bulb
C
L.E.D.
D
Electric cooker
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Solution
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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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