For which of the following applications a D.C. motor is preferred over an A.C. motor ?
For which of the following applications a D.C. motor is preferred over an A.C. motor ? Read More »
The mechanical power developed by a shunt motor will be maximum when the ratio of back e.m.f. to applied voltage is
If the supply voltage for a D.C. motor is increased, which of the following will decrease ?
Which one of the following is not the function of pole shoes in a D.C. machine ?
Which one of the following is not the function of pole shoes in a D.C. machine ? Read More »
Which of the following motor is preferred for operation in highly explosive atmosphere ?
Which of the following motor is preferred for operation in highly explosive atmosphere ? Read More »
In case of conductively compensated D.C. series motors, the compensating winding is provided
Sparking at the commutator of a D.C. motor may result in
Sparking at the commutator of a D.C. motor may result in Read More »
For the same H.P. rating and full load speed, following motor has poor starting torque
For the same H.P. rating and full load speed, following motor has poor starting torque Read More »
If a D.C. shunt motor is working at no load and if shunt field circuit suddenly opens
If a D.C. shunt motor is working at no load and if shunt field circuit suddenly opens Read More »
