Synchronous Motors The direction of rotation of a synchronous motor can be reversed by reversing, Supply phase sequence None of the listed here Current to field winding Polarity of rotor poles Supply phase sequence None of the listed here Current to field winding Polarity of rotor poles ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The back e.m.f. of a synchronous motor depends on speed All of these load angle load speed All of these load angle load ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The ratio of starting torque to running torque in a synchronous motor is Two One Infinity Zero Two One Infinity Zero ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The magnitude of field flux in a 3-phase synchronous motor Varies with the load Varies with speed Varies with power factor Remains constant at all loads Varies with the load Varies with speed Varies with power factor Remains constant at all loads ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors An important advantage of a synchronous motor over wound round induction motor is that 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 None of these its power factor may be varied at will ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When load on an over-excited or under excited synchronous motor is increased, rate of change of its armature current as compared with that of power factor is equal less twice more equal less twice more ANSWER DOWNLOAD EXAMIANS APP
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