In D.C. machines the residual magnetism is of the order of
In D.C. machines the residual magnetism is of the order of
In D.C. machines the residual magnetism is of the order of Read More »
DC Motor MCQs
The condition for maximum power in case of D.C. motor is
The condition for maximum power in case of D.C. motor is
The condition for maximum power in case of D.C. motor is Read More »
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 ?
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
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 ?
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 ?
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 ?
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
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
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
For the same H.P. rating and full load speed, following motor has poor starting torque Read More »