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Question
In an electric motor, the direction of current in the coil changes once in each :
(a) two rotations (b) one rotation (c) half rotation (d) one-fourth rotation
In an electric motor, the direction of current in the coil changes once in each :
(a) two rotations (b) one rotation (c) half rotation (d) one-fourth rotation
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Solution
(c) Half rotation
Because the current changes when the coil becomes perpendicular to the magnetic field and which is two times in one rotation so once in half rotation.
Because the current changes when the coil becomes perpendicular to the magnetic field and which is two times in one rotation so once in half rotation.
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