DC Motors The mechanical power developed in a dc motor is maximum when back emf is equal to _____ the applied voltage. One-third Half Twice None of the listed here One-third Half Twice None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Motors If a D.C. motor is to be selected for conveyors, which rriotor would be preferred ? Differentially compound motor Cumulative compound motor Shunt motor Series motor Differentially compound motor Cumulative compound motor Shunt motor Series motor ANSWER DOWNLOAD EXAMIANS APP
DC Motors In D.C. machines the residual magnetism is of the order of 50 to 75 percent 20 to 25 percent 2 to 3 percent 10 to 15 percent 50 to 75 percent 20 to 25 percent 2 to 3 percent 10 to 15 percent ANSWER DOWNLOAD EXAMIANS APP
DC Motors What will happen if the back emf of a dc motor vanishes suddenly? The motor will continue to run The armature may burn The motor will stop The motor will run noisy The motor will continue to run The armature may burn The motor will stop The motor will run noisy ANSWER DOWNLOAD EXAMIANS APP
DC Motors If a dc motor is comnected across the AC supply it will Run at normal speed Burn due to heat produced in the field winding by eddy currents Run at lower speed Not run Run at normal speed Burn due to heat produced in the field winding by eddy currents Run at lower speed Not run ANSWER DOWNLOAD EXAMIANS APP
DC Motors The plugging gives the Smallest torque braking Zero torque braking None of the listed here Highest torque braking Smallest torque braking Zero torque braking None of the listed here Highest torque braking ANSWER DOWNLOAD EXAMIANS APP
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