DC Motors In a dc machines the residual magnetism is of the order of 10 to 15 percent 20 to 25 percent 50 to 75 percent 2 to 3 percent 10 to 15 percent 20 to 25 percent 50 to 75 percent 2 to 3 percent ANSWER DOWNLOAD EXAMIANS APP
DC Motors In variable speed motor Same commutating field is needed at low speed than at high speed A weaker commutating field is needed at low speed than at high speed None of these A stronger commutating field is needed at low speed than at high speed Same commutating field is needed at low speed than at high speed A weaker commutating field is needed at low speed than at high speed None of these A stronger commutating field is needed at low speed than at high speed ANSWER DOWNLOAD EXAMIANS APP
DC Motors A compensating winding is an auxiliary winding embedded in slots in The pole faces of main poles Partly in pole faces, partly in armature None of the listed here The armature The pole faces of main poles Partly in pole faces, partly in armature None of the listed here The armature ANSWER DOWNLOAD EXAMIANS APP
DC Motors The maximum end play of a motor is about 2 mm 6 mm 10 mm 0.4 mm 2 mm 6 mm 10 mm 0.4 mm ANSWER DOWNLOAD EXAMIANS APP
DC Motors The shaft torque in a dc motor is less than total armature torque because of ______ in the motor. Field losses Cu losses Iron and friction losses None of the listed here Field losses Cu losses Iron and friction losses None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following can be used for controlling the speed of a dc motor? Transistor Thermistor Thyratron Thyristor Transistor Thermistor Thyratron Thyristor ANSWER DOWNLOAD EXAMIANS APP