Question

. The shaft torque of a dc motor is less
than its armature torque because of
(1) Copper losses
(2) Mechanical losses
(3) Back emf
(4) Rotational losses​

Answer 1

Answer:

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Explanation:

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Answer 2

Concept introduction:

A sort of electric machine that transforms electrical energy into mechanical energy is a direct current (DC) motor. Direct current (DC) motors take electrical power and turn it into mechanical rotation.

Explanation:

Given that, shaft torque of a dc motor is less than its armature torque.

We have to find, reason behind shaft torque being less than armature torque.

According to the question,

A sort of electric machine that transforms electrical energy into mechanical energy is a direct current (DC) motor. Direct current (DC) motors take electrical power and turn it into mechanical rotation.

Final Answer:

Option (2) Mechanical losses.

SPJ3