Electrical Machines The function of field regulator in a DC compound motor is to none of above. vary the armature resistance. limit the armature current. control field current. none of above. vary the armature resistance. limit the armature current. control field current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case the conditions for maximum power for DC motor are established, the efficiency of the motor will be Around 100 %. Around 90 % Any where between 75 % and 90 %. Less than 50 % Around 100 %. Around 90 % Any where between 75 % and 90 %. Less than 50 % ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The magnetic field which initially induces emf in the armature in a self excited DC generator is because of permanent magnets. residual magnetism. None of these armature reaction. permanent magnets. residual magnetism. None of these armature reaction. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which machine is used for battery charging? DC shunt generator. DC series generator. None of these. Compounded DC generator. DC shunt generator. DC series generator. None of these. Compounded DC generator. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Current in a coil undergoing commutation is not able to get reversed completely by the end of commutation period. It is due to coil resistance. None of these reactance voltage induced in the coil. armature emf. coil resistance. None of these reactance voltage induced in the coil. armature emf. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The main disadvantage(s) of the ward-Leonard system is/are poor overall efficiency. high initial cost. all of above. high maintenance cost. poor overall efficiency. high initial cost. all of above. high maintenance cost. ANSWER DOWNLOAD EXAMIANS APP
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