The magnetic circuit of a dc shunt generator with negligible armature resistance and brush contact voltage drop remains unsaturated when it delivers full-load current at rated terminal voltage. The brushes are kept in the interpolar axis and speed is maintained constant. When the load is switched off, the terminal voltage would

Electrical Machines
The magnetic circuit of a dc shunt generator with negligible armature resistance and brush contact voltage drop remains unsaturated when it delivers full-load current at rated terminal voltage. The brushes are kept in the interpolar axis and speed is maintained constant. When the load is switched off, the terminal voltage would

decrease

become zero

increase

remain the same

decrease

become zero

increase

remain the same

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In a loaded DC generator, if the brushes are given a shift from the interpolar axis in the direction of rotation, then the commutation will

improve with rise in terminal voltage.

deteriorate with fall of terminal voltage.

improve with fall of terminal voltage.

deteriorate with rise in terminal voltage.

improve with rise in terminal voltage.

deteriorate with fall of terminal voltage.

improve with fall of terminal voltage.

deteriorate with rise in terminal voltage.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
CRGO steel is used in the core of transformer to reduce

both eddy current and hysteresis loss.

eddy current loss.

ohmic loss.

hysteresis loss.

both eddy current and hysteresis loss.

eddy current loss.

ohmic loss.

hysteresis loss.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Series generators are used in which of the following applications?

Used as boosters in dc distribution or transmission.

Arc welding.

Air crafts.

All of these

Used as boosters in dc distribution or transmission.

Arc welding.

Air crafts.

All of these

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
An unexcited single phase synchronous motor is

reluctance motor.

universal motor.

AC series motor.

repulsion motor.

reluctance motor.

universal motor.

AC series motor.

repulsion motor.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A part an alternator winding consist of eight coils in series, each having an emf of 20 V rms induced in it. Coils are placed in successive slots and between each slot and the next, there is an electrical phase displacement of 30°. Find the emf of eight coils in series

66.91 V.

56.91 V.

76.91 V.

86.91 V.

66.91 V.

56.91 V.

76.91 V.

86.91 V.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines

Electrical Machines In a loaded DC generator, if the brushes are given a shift from the interpolar axis in the direction of rotation, then the commutation will

Electrical Machines CRGO steel is used in the core of transformer to reduce

Electrical Machines Series generators are used in which of the following applications?

Electrical Machines An unexcited single phase synchronous motor is

Electrical Machines A part an alternator winding consist of eight coils in series, each having an emf of 20 V rms induced in it. Coils are placed in successive slots and between each slot and the next, there is an electrical phase displacement of 30°. Find the emf of eight coils in series

Electrical Machines
In a loaded DC generator, if the brushes are given a shift from the interpolar axis in the direction of rotation, then the commutation will

Electrical Machines
CRGO steel is used in the core of transformer to reduce

Electrical Machines
Series generators are used in which of the following applications?

Electrical Machines
An unexcited single phase synchronous motor is

Electrical Machines
A part an alternator winding consist of eight coils in series, each having an emf of 20 V rms induced in it. Coils are placed in successive slots and between each slot and the next, there is an electrical phase displacement of 30°. Find the emf of eight coils in series