The negative phase sequence in a three phase synchronous motor exists when the motor is……..

A constant voltage generator has

In a synchronous generator a divided winding rotor is preferable to a conventional winding factor is preferable to a conventional winding rotor because of

Which of the following methods would give a higher than actual value of regulation of an alternator?

If the excitation of a 3-Phase alternator operating on infinite bus bars is changed, which of the following shall alter?

The main advantage of distributing the winding in slots is to

In synchronous machine, damper windings are used to

In an alternator, armature reaction is considered equivalent to

To reduce the harmonics in the emf generated in an alternator

The a.c. the armature winding of an alternator is

The pitch factor for a full pitch winding of a synchronous machine is

In the case of Zero Power factor leading load on the alternator, the effect of armature reaction is

The Output frequency of an alternator depends on

The power factor of an Alternator depends on

When the power factor of an alternator is unity then the armature flux will be

For a 50Hz ,2-Pole the maximum speed of an alternator is

In 3-Phase Synchronous motor if one of the phases is short circuited the motor will

For a Synchronous motor, the breakdown torque will be proportional to

In a Synchronous motor, at no-load, and condition, and with normal excitation the

Armature current drawn by a synchronous motor is

In a Synchronous motor, ”Hunting” may be due to variation in any of the following

EXCEPT

A capacitor start single phase induction motor will usually have a power factor of

A capacitor start, capacitor run single phase induction motor is basically a

The starting torque of a capacitor start motor is

The torque developed by a split phase motor is proportional to

A capacitor start single phase induction motor is switched on the supply with its capacitor

replaced by an inductor of equivalent reactance value. It will

The starting capacitor of a single phase motor is

Which of the following is the most economical method of starting a single phase motor

The number of turns in the starting winding of a capacitor start motor as compared to that for split phase motor is

In a split phase motor, the ratio of number of turns for starting winding to that for running winding is

A single phase motor generally used for small air compressor is

Out of the following motors, which will give the highest starting torque

Which single phase ac motor will you select for record players and tape recorders ?

A universal motor is one

The motor used in household refrigerators is

Single phase motors are commercially manufactured up to

The direction of rotation of universal motor can be reversed by

synchronous motor works on the principle of

Synchronous motors are

The method used for starting of synchronous motor is/are