The result of slip test on a 3-phase, 20 KVA, 400 V, 50 Hz connected salient pole alternator is given below- Phase value: Vmax = 100 V, Vmin = 96 V, Imax = 10 A and I min = 7 A. The direct and quadranature axis reactances are respectively

Electrical Machines
The result of slip test on a 3-phase, 20 KVA, 400 V, 50 Hz connected salient pole alternator is given below- Phase value: Vmax = 100 V, Vmin = 96 V, Imax = 10 A and I min = 7 A. The direct and quadranature axis reactances are respectively

8.248 and 9.60 ÃŽÂ©.

8.248 and 5.54 ÃŽÂ©.

14.28 and 5.54 ÃŽÂ©.

14.28 and 9.60 ÃŽÂ©.

8.248 and 9.60 ÃŽÂ©.

8.248 and 5.54 ÃŽÂ©.

14.28 and 5.54 ÃŽÂ©.

14.28 and 9.60 ÃŽÂ©.

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Electrical Machines
In a DC machine

current and emf at the terminals are alternating.

current and emf in armature are unidirectional

emf in armature conductors and at the terminals is alternating.

current and emf in armature are alternating.

current and emf at the terminals are alternating.

current and emf in armature are unidirectional

emf in armature conductors and at the terminals is alternating.

current and emf in armature are alternating.

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Electrical Machines
A 100/10, 50 VA double winding transformer is converted to 100/110 V auto transformer. The rating of auto transformer is

100 VA

550 VA

110 VA

500 VA

100 VA

550 VA

110 VA

500 VA

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Electrical Machines
The armature MMF waveform of a DC machine is

triangular.

rectangular.

sinusoidal.

pulsating.

triangular.

rectangular.

sinusoidal.

pulsating.

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Electrical Machines
Which of the following pairs is/are correct?

open slot----- leakage flux is less

semi closed slot-----leakage flux is moderate

closed slot----- leakage flux is high

All of these

open slot----- leakage flux is less

semi closed slot-----leakage flux is moderate

closed slot----- leakage flux is high

All of these

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Electrical Machines
When the mechanical power is developed by a DC motor maximum

back emf is equal to applied voltage.

Back emf is equal.

Back emf is equal to half of applied voltage.

None of above.

back emf is equal to applied voltage.

Back emf is equal.

Back emf is equal to half of applied voltage.

None of above.

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Electrical Machines

Electrical Machines The result of slip test on a 3-phase, 20 KVA, 400 V, 50 Hz connected salient pole alternator is given below- Phase value: Vmax = 100 V, Vmin = 96 V, Imax = 10 A and I min = 7 A. The direct and quadranature axis reactances are respectively

Electrical Machines In a DC machine

Electrical Machines A 100/10, 50 VA double winding transformer is converted to 100/110 V auto transformer. The rating of auto transformer is

Electrical Machines The armature MMF waveform of a DC machine is

Electrical Machines Which of the following pairs is/are correct?

Electrical Machines When the mechanical power is developed by a DC motor maximum

Electrical Machines
The result of slip test on a 3-phase, 20 KVA, 400 V, 50 Hz connected salient pole alternator is given below- Phase value: Vmax = 100 V, Vmin = 96 V, Imax = 10 A and I min = 7 A. The direct and quadranature axis reactances are respectively

Electrical Machines
In a DC machine

Electrical Machines
A 100/10, 50 VA double winding transformer is converted to 100/110 V auto transformer. The rating of auto transformer is

Electrical Machines
The armature MMF waveform of a DC machine is

Electrical Machines
Which of the following pairs is/are correct?

Electrical Machines
When the mechanical power is developed by a DC motor maximum