Search
.Management Sciences
A. these motors have high starting torque
B. these motors are not self-starting
C. back e.m.f. of these motors is zero initially
D. to restrict armature current as there is no back e.m.f. while starting
Related Mcqs:
- When two D.C. series motors are connected in parallel, the resultant speed is____________?
- A. more than the normal speed B. loss than the normal speed C. normal speed D. zero...
- In D.C. motor which of the following can sustain the maximum temperature rise?
- A. Slip rings B. Commutator C. Field winding D. Armature winding...
- Speed control by Ward Leonard method gives uniform speed variation_____________?
- A. in one direction B. in both directions C. below normal speed only D. above normal speed only...
- For a D.C. shunt motor if the excitation is changed_______________?
- A. torque will remain constant B. torque will change but power will remain constant C. torque and power both will change D. torque, power and speed, all will change...
- In a D.C. generator, the iron losses mainly take place in___________/
- A. yoke B. commutator C. armature conductors D. armature rotor...
Recent Comments