Synchronous Motors The operating speed of a synchronous motor can be changed to new fixed value by changing the load changing frequency changing the supply voltage using brakes changing the load changing frequency changing the supply voltage using brakes ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In a 3-phase synchronous motor, the negative phase sequence exists when the motor is supplied with unbalanced voltage None of these over-loaded under-loaded supplied with unbalanced voltage None of these over-loaded under-loaded ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor can be started by Dc compound motor Pony motor Provinding damper winding All of the listed here Dc compound motor Pony motor Provinding damper winding All of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor develop maximum power when load angle is 90° 60° 120° 45° 90° 60° 120° 45° ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors As the load is applied to a synchronous motor, the motor takes more armature current because The back e.m.f. decreases causing an increase in motor current The rotor strengthens the rotating field causing more motor current The rotor by shifting its phase backward causes motor to take more current The increased load has to take more current The back e.m.f. decreases causing an increase in motor current The rotor strengthens the rotating field causing more motor current The rotor by shifting its phase backward causes motor to take more current The increased load has to take more current ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor can operate at Lagging, leading and unity power factors Lagging power factor only Unity power factor only Leading power factor Lagging, leading and unity power factors Lagging power factor only Unity power factor only Leading power factor ANSWER DOWNLOAD EXAMIANS APP
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