In a dc generator operating on load with its brushes on the geometrical neutral axis (GNA), the magnetic neutral axis (MNA) is shifted in the direction of rotation. Now, if the brushes are given a lead of 90° (electrical), then the MNA will

Electrical Machines
In a dc generator operating on load with its brushes on the geometrical neutral axis (GNA), the magnetic neutral axis (MNA) is shifted in the direction of rotation. Now, if the brushes are given a lead of 90° (electrical), then the MNA will

shift forward by less than 90°

shift forward by more than 90°

coincide with the GNA

shift forward by 90°

shift forward by less than 90°

shift forward by more than 90°

coincide with the GNA

shift forward by 90°

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Electrical Machines
Which of the following motor is expensive for same Kw output rates?

AC single phase motor.

DC Shunt Motor

Induction motor.

Synchronous motor.

AC single phase motor.

DC Shunt Motor

Induction motor.

Synchronous motor.

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Electrical Machines
Transformer action requires a

increasing magnetic flux.

alternating magnetic lux.

alternating electric flux.

constant magnetic flux.

increasing magnetic flux.

alternating magnetic lux.

alternating electric flux.

constant magnetic flux.

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Electrical Machines
If the field winding connection of DC shunt motor is changed

It will run in opposite direction.

It will run in same direction.

motor will become slow.

motor will not run.

It will run in opposite direction.

It will run in same direction.

motor will become slow.

motor will not run.

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Electrical Machines
What is the effect of armature reaction ?

Armature flux distorts the main field flux.

Both option B and C.

None of the options.

Armature flux weakens the main field flux.

Armature flux distorts the main field flux.

Both option B and C.

None of the options.

Armature flux weakens the main field flux.

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Electrical Machines
A flat compound generator is obtained from compound generator by connecting a variable resistor

in parallel with the series field

in series with the shunt field

in parallel with the shunt field

in series with the series field

in parallel with the series field

in series with the shunt field

in parallel with the shunt field

in series with the series field

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Electrical Machines

Electrical Machines In a dc generator operating on load with its brushes on the geometrical neutral axis (GNA), the magnetic neutral axis (MNA) is shifted in the direction of rotation. Now, if the brushes are given a lead of 90° (electrical), then the MNA will

Electrical Machines Which of the following motor is expensive for same Kw output rates?

Electrical Machines Transformer action requires a

Electrical Machines If the field winding connection of DC shunt motor is changed

Electrical Machines What is the effect of armature reaction ?

Electrical Machines A flat compound generator is obtained from compound generator by connecting a variable resistor

Electrical Machines
In a dc generator operating on load with its brushes on the geometrical neutral axis (GNA), the magnetic neutral axis (MNA) is shifted in the direction of rotation. Now, if the brushes are given a lead of 90° (electrical), then the MNA will

Electrical Machines
Which of the following motor is expensive for same Kw output rates?

Electrical Machines
Transformer action requires a

Electrical Machines
If the field winding connection of DC shunt motor is changed

Electrical Machines
What is the effect of armature reaction ?

Electrical Machines
A flat compound generator is obtained from compound generator by connecting a variable resistor