DC Motors Small dc motors up to 5 HP usually have 6 poles 4 poles 2 poles 8 poles 6 poles 4 poles 2 poles 8 poles ANSWER DOWNLOAD EXAMIANS APP
DC Motors If the speed of a dc shunt motor is increased the back emf of the motor will Become zero Increase Remains same Decrease Become zero Increase Remains same Decrease ANSWER DOWNLOAD EXAMIANS APP
DC Motors Motor starter are essential for Starting the motor Avoiding excessive starting current Accelerating the motor Preventing fuse blowing Starting the motor Avoiding excessive starting current Accelerating the motor Preventing fuse blowing ANSWER DOWNLOAD EXAMIANS APP
DC Motors In D.C. machines the residual magnetism is of the order of 50 to 75 percent 2 to 3 percent 10 to 15 percent 20 to 25 percent 50 to 75 percent 2 to 3 percent 10 to 15 percent 20 to 25 percent ANSWER DOWNLOAD EXAMIANS APP
DC Motors D.C. series motors are used Where load changes frequently None of these Where load is constant Where constant operating speed is needed Where load changes frequently None of these Where load is constant Where constant operating speed is needed ANSWER DOWNLOAD EXAMIANS APP
DC Motors The armature voltage control of dc motor provides None of the listed here Constant current drive Constant torque drive Constant voltage drive None of the listed here Constant current drive Constant torque drive Constant voltage drive ANSWER DOWNLOAD EXAMIANS APP
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