As torque on an electric motor increases, the electrical current ______.

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Study for the PMMI Mechanical Drives Test with engaging multiple choice questions and detailed explanations. Enhance your knowledge on mechanical drives and get ready for your exam!

Multiple Choice

As torque on an electric motor increases, the electrical current ______.

Explanation:
Torque in most electric motors is produced by the current in the windings, so producing more torque requires more current. In a DC motor, increasing the armature current strengthens the magnetic field and directly increases torque. When the load torque rises while voltage stays the same, the motor slows down, reducing back-EMF. With less back-EMF opposing the applied voltage, more current flows, allowing the motor to develop the higher torque needed. So the electrical current increases as torque increases.

Torque in most electric motors is produced by the current in the windings, so producing more torque requires more current. In a DC motor, increasing the armature current strengthens the magnetic field and directly increases torque. When the load torque rises while voltage stays the same, the motor slows down, reducing back-EMF. With less back-EMF opposing the applied voltage, more current flows, allowing the motor to develop the higher torque needed. So the electrical current increases as torque increases.

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