Synchronous Motors An important advantage of a synchronous motor over wound round induction motor is that None of these its power factor may be varied at will its speed is independent of supply frequency its speed may be controlled more easily None of these its power factor may be varied at will its speed is independent of supply frequency its speed may be controlled more easily ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors As the load is applied to a synchronous motor, the motor takes more armature current because The rotor by shifting its phase backward causes motor to take more current The rotor strengthens the rotating field causing more motor current The back e.m.f. decreases causing an increase in motor current The increased load has to take more current The rotor by shifting its phase backward causes motor to take more current The rotor strengthens the rotating field causing more motor current The back e.m.f. decreases causing an increase in motor current The increased load has to take more current ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When the synchronous motor runs at synchronous speed, the voltage induced in the damper winding is _____ Maximum None of the listed here minimum Zero Maximum None of the listed here minimum Zero ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The angle between the rotor poles and stator poles, in a synchronous motor, is known as Torque angle Synchronising angle Power factor angle Angle of retardation Torque angle Synchronising angle Power factor angle Angle of retardation ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors If one phase of a 3 phase synchronous motor is short circuited, motor Will fail to pull into step Will not come upto speed Will overheat in spots Will refused ro start Will fail to pull into step Will not come upto speed Will overheat in spots Will refused ro start ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous machine with low value of short-circuit ratio has good speed regulation high stability limit lower stability limit good voltage regulation good speed regulation high stability limit lower stability limit good voltage regulation ANSWER DOWNLOAD EXAMIANS APP
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