Introduction To Industrial Maintenance Practice Test

As the torque on an electric motor increases, what happens to the current?

The voltage increases The current increases The speed increases The torque decreases

Correct Answer:

The current increases

Explanation:

Torque in an electric motor is produced by current through the windings, and the torque is proportional to that current. When more torque is required, the motor draws more current to generate it. With a fixed supply voltage, increasing load tends to slow the motor, which reduces back EMF. Less back EMF means less opposing voltage inside the motor, so more current can flow, raising torque again until a new balance is reached. The winding voltage itself doesn’t have to rise, and speed typically falls under heavier torque rather than increasing. So the current increases.

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