DC Motors Small dc motors up to 5 HP usually have 6 poles 2 poles 8 poles 4 poles 6 poles 2 poles 8 poles 4 poles ANSWER DOWNLOAD EXAMIANS APP
DC Motors Usually wide and sensitive speed control is desired in case of Steel rolling mills Centrifugal pumps Colliery winders Elevators Steel rolling mills Centrifugal pumps Colliery winders Elevators ANSWER DOWNLOAD EXAMIANS APP
DC Motors D.C. series motors are used Where constant operating speed is needed Where load is constant Where load changes frequently None of these Where constant operating speed is needed Where load is constant Where load changes frequently None of these ANSWER DOWNLOAD EXAMIANS APP
DC Motors What will happen if the back emf of a dc motor vanishes suddenly? The motor will run noisy The motor will continue to run The motor will stop The armature may burn The motor will run noisy The motor will continue to run The motor will stop The armature may burn ANSWER DOWNLOAD EXAMIANS APP
DC Motors For a D.C. shunt motor if the excitation is changed Torque, power and speed, all will change Torque will change but power will remain constant Torque and power both will change Torque will remain constant Torque, power and speed, all will change Torque will change but power will remain constant Torque and power both will change Torque will remain constant ANSWER DOWNLOAD EXAMIANS APP
DC Motors A dc motor is still used in industrial applications because it Is cheap Is simple in construction None of the listed here Provides fine speed control Is cheap Is simple in construction None of the listed here Provides fine speed control ANSWER DOWNLOAD EXAMIANS APP
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