The speed of a dc motor is
A. directly proportional to back emf and flux.
B. directly proportional to its back emf and inversely proportional to flux.
C. inversely proportional to both back emf and flux.
D. directly proportional to flux and inversely proportional to back emf.
Answer:B
The speed of a dc motor is
A. directly proportional to back emf and flux. B. directly proportional to its back emf and inversely proportional to flux. C. inversely proportional to both back emf and flux. D. directly proportional to flux and inversely proportional to back emf.