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

14.28 and 9.60 ÃŽÂ©.

8.248 and 9.60 ÃŽÂ©.

14.28 and 5.54 ÃŽÂ©.

8.248 and 5.54 ÃŽÂ©.

14.28 and 9.60 ÃŽÂ©.

8.248 and 9.60 ÃŽÂ©.

14.28 and 5.54 ÃŽÂ©.

8.248 and 5.54 ÃŽÂ©.

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Electrical Machines
which of the following type of brush and their application is/are correct

All of these

electro graphite → large ratings

carbon brush → normal ratings

copper graphite → low voltage high current density

All of these

electro graphite → large ratings

carbon brush → normal ratings

copper graphite → low voltage high current density

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Electrical Machines
Which of the following motor has more stability

cylindrical motor

None of these

both motors has same stability

salient pole motor

cylindrical motor

None of these

both motors has same stability

salient pole motor

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Electrical Machines
A dc shunt generator has full-load voltage regulation of 10% at rated speed of 1000 rpm. If it is now driven at 1250 rpm, then its voltage regulation at full load would

remain unchanged

be less than 10%

be 12.5%

be more than 10%

remain unchanged

be less than 10%

be 12.5%

be more than 10%

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Electrical Machines
If the handle of a three point starter goes to back to OFF position, it may be due to

zero or very low voltage supply.

all of these.

over load.

high filed circuit resistance.

zero or very low voltage supply.

all of these.

over load.

high filed circuit resistance.

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Electrical Machines
A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The net voltage across the armature resistance at the time of plugging will be

234 V

474 V

240 V

6 V

234 V

474 V

240 V

6 V

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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 which of the following type of brush and their application is/are correct

Electrical Machines Which of the following motor has more stability

Electrical Machines A dc shunt generator has full-load voltage regulation of 10% at rated speed of 1000 rpm. If it is now driven at 1250 rpm, then its voltage regulation at full load would

Electrical Machines If the handle of a three point starter goes to back to OFF position, it may be due to

Electrical Machines A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The net voltage across the armature resistance at the time of plugging will be

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
which of the following type of brush and their application is/are correct

Electrical Machines
Which of the following motor has more stability

Electrical Machines
A dc shunt generator has full-load voltage regulation of 10% at rated speed of 1000 rpm. If it is now driven at 1250 rpm, then its voltage regulation at full load would

Electrical Machines
If the handle of a three point starter goes to back to OFF position, it may be due to

Electrical Machines
A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The net voltage across the armature resistance at the time of plugging will be