Sparking at the commutator of a D.C. motor may result in

Related MCQs

• Sparking, is discouraged in a D.C. motor because
• By looking at which part of the motor, it can be easily confirmed that a particular motor is D.C. motor?
• Flywheel is used with D.C. compound motor to reduce the peak demand by the motor, compound motor will have to be
• One D.C. motor drives another D.C. motor. The second D.C. motor when excited and driven
• B. DC MOTOR 1. No-load speed of which of the following motor will be highest ?
• 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
• For which of the following applications a D.C. motor is preferred over an A.C. motor ?
• 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