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Q.

The direction of rotation of a coil in an electric motor is determined by

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a

Fleming's right-hand rule

b

Fleming's left-hand rule

c

Faraday law of electromagnetic inductors

d

None of above

answer is B.

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Detailed Solution

The direction of rotation of a coil in an electric motor is determined by Fleming's left-hand rule.
"Fleming's left-hand rule states that if we stretch the thumb, forefinger and middle finger of the left hand perpendicular to each other, then the thumb points the direction of motion, forefinger points the direction of magnetic field and middle finger points the direction of current." Thus, the direction of rotation of a coil in an electric motor is determined by Fleming's left-hand rule.
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