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Question

A coil carries a current in a magnetic field. The coil experiences a turning effect. Which device uses this effect?


A
A d.c motor
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B
An electromagnet
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C
A relay
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D
A transformer
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Solution

The correct option is D A d.c motor
A simple electric motor can be built using a coil of wire that is free to rotate between two opposite magnetic poles. When an electric current flows through the coil, the coil experiences a force and moves.
So, it must be a d.c. motor.

Physics

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