Electrical Machines During hunting of a synchronous motor negative phase sequence currents are generated. harmonic are developed in the armature circuit. field excitation increases. damper bar develops torque. negative phase sequence currents are generated. harmonic are developed in the armature circuit. field excitation increases. damper bar develops torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generator, armature reaction refers to what? Effect of armature flux on the load. Effect of field flux on the armature flux. Effect of armature flux on the main field flux. None of these Effect of armature flux on the load. Effect of field flux on the armature flux. Effect of armature flux on the main field flux. None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the handle of a three point starter goes to back to OFF position, it may be due to high filed circuit resistance. zero or very low voltage supply. all of these. over load. high filed circuit resistance. zero or very low voltage supply. all of these. over load. 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 one fourth. double. half. 4 times. one fourth. double. half. 4 times. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In salient pole synchronous machine, the reluctance power varies as sin2δ cos2δ sinδ cosδ sin2δ cos2δ sinδ cosδ ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 250 V DC generator in run at rated speed with no excitation. The open circuit voltage will be zero. about 100 V. very small, say about 2 or 3 V. 250 V. zero. about 100 V. very small, say about 2 or 3 V. 250 V. ANSWER DOWNLOAD EXAMIANS APP
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