The starting torque of a D.C. motor is independent of which of the following?
Correct answer: D. Speed
- A. Flux
- B. Armature current
- C. Flux and armature current
- D. Speed
Explanation
The DC motor torque relation is T ∝ ΦIa, so starting torque depends on flux and armature current. At starting the speed is zero, but speed itself does not appear in the torque expression.
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