SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which one of this factor does not increase the speed of rotation in an electric motor
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increase in current
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increase the strength of the magnet
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decrease the number of turns of wire in the coil
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increase the number of turns of wire in the coil
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Explanation:
Detailed explanation-1: -More Coils Make Motors More Efficient Therefore, low-power motors with high speeds will require more magnetomotive force. This means more coils will be needed along with a higher number of turns with a thin wire that produces higher current density.
Detailed explanation-2: -The torque and speed relationship is inversely proportional since the rated output power of a motor is a fixed value. As output speed increases, the available output torque decreases proportionately.
There is 1 question to complete.