Electrical Machines Considering a galvanometer is connected to the rotor of a 3 - Φ, 4 pole, 50 Hz IM and is making 130 oscillations in a minute, then calculate the rotor speed? 1450. 1435. 1440. 1500. 1450. 1435. 1440. 1500. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If in DC Shunt Motor the flux is reduced suddenly to zero, then the speed of motor will be reduced. the motor will come to stop. the armature current will reduce. the motor will attain dangerously high speed. the speed of motor will be reduced. the motor will come to stop. the armature current will reduce. the motor will attain dangerously high speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction in dc motor results short circuit. open circuit. decrease in speed. increase in speed. short circuit. open circuit. decrease in speed. increase in speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If starter is not used with large DC motor for starting, it will provide execessive voltage drop in line. all of above. damage the armature and commutator. draw a starting current many times its rated full load current. provide execessive voltage drop in line. all of above. damage the armature and commutator. draw a starting current many times its rated full load current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In salient pole synchronous machine, if direct axis reactance and quadrature axis reactance is equal, then power developed due to reluctance is maximum infinite value zero any of the above maximum infinite value zero any of the above ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Regenerative braking is possible in DC shunt motor with armature resistance control. DC series motor. DC compound motor. DC shunt motor with field weakening control. DC shunt motor with armature resistance control. DC series motor. DC compound motor. DC shunt motor with field weakening control. ANSWER DOWNLOAD EXAMIANS APP
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