Electrical Machines Rotor resistance speed control is used in synchronous motor. slip ring induction motor. squirrel cage induction motor. dc shunt motor. synchronous motor. slip ring induction motor. squirrel cage induction motor. dc shunt motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines With the increase in speed of DC motor Both back emf as well as line current fall. Back emf increase but line current falls. Both back emf as well as line current increase. Back emf falls and line current increase. Both back emf as well as line current fall. Back emf increase but line current falls. Both back emf as well as line current increase. Back emf falls and line current increase. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature MMF waveform of a DC machine is sinusoidal. triangular. rectangular. pulsating. sinusoidal. triangular. rectangular. pulsating. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which type of bearing is provided in small induction motors to support the rotor shaft? Ball bearings. Bush bearings. Cast iron bearings. None of these Ball bearings. Bush bearings. Cast iron bearings. None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The principle of operation of a 3 - Φ induction motor is almost similar to that of transformer with secondary short circuited. synchronous motor. capacitor start induction motor. repulsion start induction motor. transformer with secondary short circuited. synchronous motor. capacitor start induction motor. repulsion start induction motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines No load primary current in a transformer lags behind applied voltage somewhat less than 90à leads the applied voltage somewhat less than 90Ã& leads the applied voltage by exactly 90Â& lags behind applied voltage by exactly 90Â&am lags behind applied voltage somewhat less than 90à leads the applied voltage somewhat less than 90Ã& leads the applied voltage by exactly 90Â& lags behind applied voltage by exactly 90Â&am ANSWER DOWNLOAD EXAMIANS APP
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