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For a universal motor, the rated supply current is 10A giving a rated torque of 100 N-m. If a current of 5A is applied, what will be generated torque vary to?

For a universal motor, the rated supply current is 10A giving a rated torque of 100 N-m. If a current of 5A is applied, what will be generated torque vary to? Correct Answer 400 N-m

The torque is proportional to the square of the current. So the new torque will be 100*(22) = 400 N-m.

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