Electrical Machines The speed of a cumulatively compound DC motor can be controlled by varying Armature voltage control. Any of above. Armature resistance control. Shunt field resistance control. Armature voltage control. Any of above. Armature resistance control. Shunt field resistance control. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines 3rd harmonics are eliminated in induction motor by using V connection. star connection. zig - zag connection. delta connection. V connection. star connection. zig - zag connection. delta connection. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Find the developed torque DC Series Motor having armature resistance of 0.2 Ω and taking armature current of 60 A is connected to 250 V supply. Considered brush drop of 1 V each. 234.76 N-m. 133.22 N-m cant be determined. 266.20 N-m. 234.76 N-m. 133.22 N-m cant be determined. 266.20 N-m. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Under operating conditions the rotor conductor should be _________________ in induction motor. always opened. always closed. semi closed or semi opened. none. always opened. always closed. semi closed or semi opened. none. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Find the number of poles required, when the frequency is 50Hz and speed of the motor is 500 rpm? 24 10 12 5 24 10 12 5 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a loaded DC motor, if the brushes are given a shift from the interpolar axis in the direction of rotation, then the commutation will deteriorate and the speed falls. improve and the speed rises. improve and the speed falls. deteriorate and the speed rises. deteriorate and the speed falls. improve and the speed rises. improve and the speed falls. deteriorate and the speed rises. ANSWER DOWNLOAD EXAMIANS APP
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