DC Motors In a D.C. shunt motor, under the conditions of maximum power, the current in the armature will be Rated full-load current Less than full-load current More than full-load current Almost negligible Rated full-load current Less than full-load current More than full-load current Almost negligible ANSWER DOWNLOAD EXAMIANS APP
DC Motors In case the conditions for maximum power for a D.C. motor are established, the efficiency of the motor will be Less than 50% 1 Anywhere between 75% and 90% Around 90% Less than 50% 1 Anywhere between 75% and 90% Around 90% ANSWER DOWNLOAD EXAMIANS APP
DC Motors 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 2.22% 4.76% 8.85% 6.77% 2.22% 4.76% 8.85% 6.77% ANSWER DOWNLOAD EXAMIANS APP
DC Motors Armature reaction in dc motor is increased When the field current increases By interpoles When the armature current decreases When the armature current increases When the field current increases By interpoles When the armature current decreases When the armature current increases ANSWER DOWNLOAD EXAMIANS APP
DC Motors For a D.C. shunt motor if the excitation is changed 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 Torque, power and speed, all will change Torque will change but power will remain constant Torque and power both will change ANSWER DOWNLOAD EXAMIANS APP
DC Motors The main disadvantage of the Ward-Leonard control method is Low efficiency at high loads All of these High maintenance cost High initial cost Low efficiency at high loads All of these High maintenance cost High initial cost ANSWER DOWNLOAD EXAMIANS APP
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