Electrical Machines A DC motor with armature resistance of 0.5 ohms connected directly to a 220 Volt supply. If the armature is stationary then the current flowing through the armature is 250 A. 440 A. 570 A. 340 A. 250 A. 440 A. 570 A. 340 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The principal of starting of 3 - Φ IM is similar to synchronous motor. transformer with short-circuited secondary. repulsion motor type starting. capacitor run IM. synchronous motor. transformer with short-circuited secondary. repulsion motor type starting. capacitor run IM. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The use of higher flux density in the transformer design increases the weigh per KVA None of these reduces the weigh per KVA has no relation with the weight of transformer increases the weigh per KVA None of these reduces the weigh per KVA has no relation with the weight of transformer ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To control the speed of an induction motor, the supply frequency is reduced by 10%. For the same magnetizing current to remain constant, the supply voltage must be reduced by 10% increased by 20% reduced by 20% increased by 10% reduced by 10% increased by 20% reduced by 20% increased by 10% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The maximum possible speed at which an alternator can be driven to generate 50 Hz and 4000 V is 1500 rpm. 3000 rpm. 4000 rpm. 3600 rpm. 1500 rpm. 3000 rpm. 4000 rpm. 3600 rpm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two DC series motors are connected in series and are driving the same mechanical load. If the motors are now connected in parallel the speed will become double. 4 times. one fourth. half. double. 4 times. one fourth. half. ANSWER DOWNLOAD EXAMIANS APP
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