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What does the increase of the resistance of the motor winding cause?

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What does the increase of the resistance of the motor winding cause?

(a) high starting current

(b) low motor torque

(c) low starting current

(d) high motor torque

I had been asked this question during an online interview.

Origin of the question is Design Steps and Considerations in section Design of Permanent Magnet (PM) DC Motors of Design of Electrical Machines

1 Answer

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The correct choice is (b) low motor torque

For explanation: The increase of the resistance of the motor winding is one of the cause of thermal failure. This produces lower motor torque in the machine.

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