Electrical Machines A 3-phase, alternator has generated emf per phase of 230 V with 10% 3rd harmonic and 6% 5th harmonic content. Calculate rms line voltage for star connection. 50 V. 230.2 V. 399 V. 100 V. 50 V. 230.2 V. 399 V. 100 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The field divertor resistance for a DC series motor is of order of 10 Ω 100 Ω 0.1 Ω 50 Ω 10 Ω 100 Ω 0.1 Ω 50 Ω ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines On switching a DC motor to DC supply mains, it is found to rotate in the direction opposite to that for which it is designed. The DC motor is Series shunt. Cummulative compound. have an equal number of electrons and protons. Differentical compound. Series shunt. Cummulative compound. have an equal number of electrons and protons. Differentical compound. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In Ward-Leonard method of speed control, the direction of rotation of motor is reversed usually reversing the connection of the motor field terminal. generator armature terminal. generator field terminal. motor armature terminal. motor field terminal. generator armature terminal. generator field terminal. motor armature terminal. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In synchronous motor, the damper winding is generally used to reduce noise level only. reduce the eddy currents. provide starting torque only. prevent hunting and provide the starting torque. reduce noise level only. reduce the eddy currents. provide starting torque only. prevent hunting and provide the starting torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The wound rotor type IM is used for____________ speed operation. constant. maximum. minimum. variable. constant. maximum. minimum. variable. ANSWER DOWNLOAD EXAMIANS APP
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