Discussion
A load whose torque varies inversely with speed is a load of
Answer: B
Correct answer: constant power
Power is torque times speed, so if the torque falls in inverse proportion to speed their product is constant. Machine tool spindles behave this way in the finishing range, and so does a coiler winding at constant tension and constant linear speed as its diameter grows. It is the characteristic a drive delivers above base speed, where the voltage has reached its ceiling and the field is being weakened.
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