The results of a slip test for determining direct axis (Xd) and quadrature axis (Xq) reactances of a star connected salient pole alternator are given below Phase values: Vmax = 108 V ; Vmin = 96 V Imax = 12 A ; Imin = 10 A Hence the two reactances will be

Electrical Machines
The results of a slip test for determining direct axis (Xd) and quadrature axis (Xq) reactances of a star connected salient pole alternator are given below Phase values: Vmax = 108 V ; Vmin = 96 V Imax = 12 A ; Imin = 10 A Hence the two reactances will be

Xd = 10.8Ω and Xq = 8Ω

Xd = 9.6Ω and Xq = 9Ω

Xd = 9Ω and Xq = 9.6Ω

Xd = 8Ω and Xq = 10.8Ω

Xd = 10.8Ω and Xq = 8Ω

Xd = 9.6Ω and Xq = 9Ω

Xd = 9Ω and Xq = 9.6Ω

Xd = 8Ω and Xq = 10.8Ω

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Electrical Machines
If the field of a dc shunt motor gets opened while the motor is running, then the

motor will become slow.

armature current will drop

motor will attain dangerously high speed

armature will oscillate about original speed as the mean speed

motor will become slow.

armature current will drop

motor will attain dangerously high speed

armature will oscillate about original speed as the mean speed

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Electrical Machines
In a 3 - ÃŽÂ¦ induction motor

power factor at starting is low as compared to that while running.

power factor at starting is high as compared to that while running.

power factor at starting in the same as that while running.

none of them.

power factor at starting is low as compared to that while running.

power factor at starting is high as compared to that while running.

power factor at starting in the same as that while running.

none of them.

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Electrical Machines
In dc motors, under leading pole tips flux density will--------?

None of these

decrease

increase

either increase or decrease

None of these

decrease

increase

either increase or decrease

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Electrical Machines
If the field current is reduced to zero the maximum power developed by alternator is

2.73 KW.

5.46 KW.

0.9103 KW.

1.644 KW.

2.73 KW.

5.46 KW.

0.9103 KW.

1.644 KW.

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Electrical Machines
In dc machines, the space waveform of the air-gap flux distribution affects

voltage but not the torque

both the torque and voltage

torque but not the voltage

neither the voltage nor the torque

voltage but not the torque

both the torque and voltage

torque but not the voltage

neither the voltage nor the torque

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Electrical Machines

Electrical Machines The results of a slip test for determining direct axis (Xd) and quadrature axis (Xq) reactances of a star connected salient pole alternator are given below Phase values: Vmax = 108 V ; Vmin = 96 V Imax = 12 A ; Imin = 10 A Hence the two reactances will be

Electrical Machines If the field of a dc shunt motor gets opened while the motor is running, then the

Electrical Machines In a 3 - ÃŽÂ¦ induction motor

Electrical Machines In dc motors, under leading pole tips flux density will--------?

Electrical Machines If the field current is reduced to zero the maximum power developed by alternator is

Electrical Machines In dc machines, the space waveform of the air-gap flux distribution affects

Electrical Machines
The results of a slip test for determining direct axis (Xd) and quadrature axis (Xq) reactances of a star connected salient pole alternator are given below Phase values: Vmax = 108 V ; Vmin = 96 V Imax = 12 A ; Imin = 10 A Hence the two reactances will be

Electrical Machines
If the field of a dc shunt motor gets opened while the motor is running, then the

Electrical Machines
In a 3 - ÃŽÂ¦ induction motor

Electrical Machines
In dc motors, under leading pole tips flux density will--------?

Electrical Machines
If the field current is reduced to zero the maximum power developed by alternator is

Electrical Machines
In dc machines, the space waveform of the air-gap flux distribution affects