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 4.76% 2.22% 8.85% 6.77% 4.76% 2.22% 8.85% 6.77% 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 1 Less than 50% Anywhere between 75% and 90% Around 90% 1 Less than 50% Anywhere between 75% and 90% Around 90% ANSWER DOWNLOAD EXAMIANS APP
DC Motors The armature voltage control of dc motor provides Constant voltage drive None of the listed here Constant torque drive Constant current drive Constant voltage drive None of the listed here Constant torque drive Constant current drive ANSWER DOWNLOAD EXAMIANS APP
DC Motors If a dc motor is comnected across the AC supply it will Run at normal speed Not run Burn due to heat produced in the field winding by eddy currents Run at lower speed Run at normal speed Not run Burn due to heat produced in the field winding by eddy currents Run at lower speed ANSWER DOWNLOAD EXAMIANS APP
DC Motors If the supply voltage for a D.C. motor is increased, which of the following will decrease? Starting torque All of these Full-load current Operating speed Starting torque All of these Full-load current Operating speed 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 armature may burn The motor will stop The motor will continue to run The motor will run noisy The armature may burn The motor will stop The motor will continue to run ANSWER DOWNLOAD EXAMIANS APP
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