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When torque of the electromagnetic origin is in the direction of rotation of armature, machine is said to be operating in which of the following mode?

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When torque of the electromagnetic origin is in the direction of rotation of armature, machine is said to be operating in which of the following mode?

(a) Depends on other parameters

(b) Generating

(c) Motoring

(d) Inducing

I had been asked this question by my college director while I was bunking the class.

This question is from Electromagnetic Power and Circuit Models in chapter Circuit Model, Emf and Torque of DC Machines

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The correct choice is (c) Motoring

Explanation: In a motoring mode, torque of the electromagnetic origin is in the direction of rotation of armature, implying electrical power is absorbed and a prime mover is not needed to run the machine. Ea and Ia are in the opposite directions.

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