Electrical Machines When maximum flux density is constant, the eddy current losses are proportional to V2 f2 f V V2 f2 f V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines During hunting of a synchronous motor harmonic are developed in the armature circuit. damper bar develops torque. field excitation increases. negative phase sequence currents are generated. harmonic are developed in the armature circuit. damper bar develops torque. field excitation increases. negative phase sequence currents are generated. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC motors, under trailing pole tips, flux density will_______ ? None of these increase decrease either increase or decrease None of these increase decrease either increase or decrease ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the source voltage of a DC motor is increased, which of the following will decrease? Operating speed. Starting torque. Starting torque, operating speed, full load current. Full load current. Operating speed. Starting torque. Starting torque, operating speed, full load current. Full load current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following load normally needs starting torque more than rated torque? Blowers. Air compressors. Conveyers. Centrifugal pumps. Blowers. Air compressors. Conveyers. Centrifugal pumps. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4-pole DC generator runs at 1500 rpm. The frequency of current in the armature winding is: 50 Hz. 100 Hz. 25 Hz. Zero Hz. 50 Hz. 100 Hz. 25 Hz. Zero Hz. ANSWER DOWNLOAD EXAMIANS APP
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