The speed of a D.C. motor can be varied by varying

Related MCQs

• The speed of a motor falls from 1100 r.p.m. at no-load to 1050 r.p.m. at rated load.The speed regulation of the motor is
• By looking at which part of the motor, it can be easily confirmedthat a particular motor is D.C. motor?
• The speed of a D.C. shunt motor more than its full-load speed can be obtained by
• Flywheel is used with D.C. compound motor to reduce the peak demand by the motor, compound motor will have to be
• In case the back e.m.f. and the speed of a D.C. motor are doubled, the torque developed by the motor will
• If the speed of a D.C. shunt motor is increased, the back e.m.f. of the motor will
• The speed of a D.C. shunt motor can be increased by
• If the field of a D.C. shunt motor gets opened while motor is running
• In case-the conditions for maximum power for a D.C. motor are established,the efficiency of the motor will be
• In a D.C. series motor, if the armature current is reduced by 50%, the torque of the motor will be equal to