A PMDC commutator motor has a no-load speed of 6,000 rpm when connected to a 120 V dc supply.
The armature resistance is 2.5 Ω and other losses may be neglected.
The speed of the motor, when supply voltage of 60 V developing a torque of 0.5 Nm, is
A. 3,000 rpm.
B. 2,673 rpm.
C. 2,836 rpm.
D. 5,346 rpm.
Show Answer
Answer: B
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