If the field of a D.C. shunt motor gets opened while motor is running______________?

Related Mcqs:

In case of D.C. shunt motors the speed is dependent on back e.m.f. only because____________?

A. back e.m.f. is equal to armature drop B. armature drop is negligible C. flux is proportional to armature current D. flux is practically constant in D:C. shunt motors...

In a D.C. shunt motor, under the conditions of maximum power, the current in the armature will be_____________?

A. almost negligible B. rated full-load current C. less than full-load current D. more than full-load current...

In case of conductively compensated D.C. series motors, the compensating winding is provided______________?

A. as separately wound unit B. in parallel with armature winding C. in series with armature winding D. in parallel with field winding...

If a D.C. motor designed for 40°C ambient temperature is to be used for 50°C ambient temperature, then the motor_____________?

A. of lower H.P. should be selected B. of higher H.P. should be selected C. can be used for 50°C ambient temperature also D. is to be derated by a factor recommended by manufacturer and select the next higher H.P. motor...

During rheostat braking of D.C. series motors_____________?

A. motor is run as a generator B. motor is reversed in direction C. motor is run at reduced speed...