In D.C. machines the residual magnetism is of the order of_________________?

Related Mcqs:

According to Fleming’s left-hand rule, when the forefinger points in the direction of the field or flux, the middle finger will point in the direction of_________________?

A. current in the conductor aovtaat of conductor C. resultant force on conductor D. none of the above...

In case-the conditions for maximum power for a D.C. motor are established, the efficiency of the motor will be______________?

A. 100% B. around 90% C. anywhere between 75% and 90% D. less than 50%...

Buses, trains, trolleys, hoists, cranes require high starting torque and therefore make use of_____________?

A. D.C. series motor B. D.C. shunt motor C. induction motor D. all of above motors...

D.C. shunt motors are used for driving____________?

A. trains B. cranes C. hoists D. machine tools...

A dc series motor should not be started on no load because it would___________?

A. not develop starting torque B. fail to start without load C. run at dangerously high speed D. draw more current without producing sufficient torque...