Consider the following statements : For a level compounded dc generator to run at constant voltage, the series field mmf must effectively compensate 1. armature reaction mmf 2.armature resistance drop 3. brush contact voltage drop Which of these statements is/are correct ?

Electrical Machines
Consider the following statements : For a level compounded dc generator to run at constant voltage, the series field mmf must effectively compensate 1. armature reaction mmf 2.armature resistance drop 3. brush contact voltage drop Which of these statements is/are correct ?

1, 2 and 3

2 alone

1 and 2

1 and 3

1, 2 and 3

2 alone

1 and 2

1 and 3

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Transformer cooling and insulating oil must be of

low resistivity.

low viscosity.

low BDV.

high viscosity.

low resistivity.

low viscosity.

low BDV.

high viscosity.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A generator may loose residual magnetism due to

over excitation.

vibrations.

any of these.

heating.

over excitation.

vibrations.

any of these.

heating.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In induction motor when the length of the air gap is increased, the magnetizing current of the motor increases while the short circuit current __________________.

increased.

kept constant to certain value.

remains unchanged.

decreased.

increased.

kept constant to certain value.

remains unchanged.

decreased.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The slip of an induction motor normally does not depend on

shaft torque.

synchronous speed.

core loss component.

rotor speed.

shaft torque.

synchronous speed.

core loss component.

rotor speed.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In applied voltage is reduced in a dc shunt motor

Full load current.

Full load torque.

None of these.

Full load speed.

Full load current.

Full load torque.

None of these.

Full load speed.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines

Electrical Machines Consider the following statements : For a level compounded dc generator to run at constant voltage, the series field mmf must effectively compensate 1. armature reaction mmf 2.armature resistance drop 3. brush contact voltage drop Which of these statements is/are correct ?

Electrical Machines Transformer cooling and insulating oil must be of

Electrical Machines A generator may loose residual magnetism due to

Electrical Machines In induction motor when the length of the air gap is increased, the magnetizing current of the motor increases while the short circuit current __________________.

Electrical Machines The slip of an induction motor normally does not depend on

Electrical Machines In applied voltage is reduced in a dc shunt motor

Electrical Machines
Consider the following statements : For a level compounded dc generator to run at constant voltage, the series field mmf must effectively compensate 1. armature reaction mmf 2.armature resistance drop 3. brush contact voltage drop Which of these statements is/are correct ?

Electrical Machines
Transformer cooling and insulating oil must be of

Electrical Machines
A generator may loose residual magnetism due to

Electrical Machines
In induction motor when the length of the air gap is increased, the magnetizing current of the motor increases while the short circuit current __________________.

Electrical Machines
The slip of an induction motor normally does not depend on

Electrical Machines
In applied voltage is reduced in a dc shunt motor