Electrical Machines In a DC generator, the armature reaction results in magnetization of leading and demagnetization of trailing pole tip. demagnetization of centers of poles. demagnetization of leading & magnetization of trailing pole tip. magnetization of inter poles. magnetization of leading and demagnetization of trailing pole tip. demagnetization of centers of poles. demagnetization of leading & magnetization of trailing pole tip. magnetization of inter poles. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Fifth harmonic component of the induced voltage in three phase AC generator can be eliminated by using a winding pitch of 4 / 5. 6 / 7. 2 / 3. 5 / 6. 4 / 5. 6 / 7. 2 / 3. 5 / 6. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The shaft of induction motor should be flexible. hollow. any of these. stiff. flexible. hollow. any of these. stiff. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In 3 - Φ induction motor some times copper bars are placed deep in the rotor to reduce copper loss. improve efficiency. improve power factor. improve starting torque. reduce copper loss. improve efficiency. improve power factor. improve starting torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An inverted V curve of synchronous motor shows variation of supply voltage and field current at constant excitation. supply voltage and excitation current at constant load. power factor and DC excitation at constant load. power factor and supply voltage during hunting. supply voltage and field current at constant excitation. supply voltage and excitation current at constant load. power factor and DC excitation at constant load. power factor and supply voltage during hunting. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If in DC Shunt Motor the flux is reduced suddenly to zero, then the armature current will reduce. the motor will come to stop. the speed of motor will be reduced. the motor will attain dangerously high speed. the armature current will reduce. the motor will come to stop. the speed of motor will be reduced. the motor will attain dangerously high speed. ANSWER DOWNLOAD EXAMIANS APP
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