A 400 V dc shunt motor takes 5 A at ___

A 400 V dc shunt motor takes 5 A at no load. Ra = 0.5 Ω, Rf= 200 Ω.

What is the ratio of speed from full load to no-load when the dc shunt motor takes 50 A on full load?

A. 0.94
B. 0.8
C. 0.6
D. 0.4

Show Answer

Answer: A

Share your understanding of this question with the correct explanation.