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 5.54 ÃŽÂ©.

8.248 and 9.60 ÃŽÂ©.

14.28 and 5.54 ÃŽÂ©.

14.28 and 9.60 ÃŽÂ©.

8.248 and 5.54 ÃŽÂ©.

8.248 and 9.60 ÃŽÂ©.

14.28 and 5.54 ÃŽÂ©.

14.28 and 9.60 ÃŽÂ©.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
For pure resistive load what is the armature reaction?

cross magnetization

All of these

magnetization

demagnetization

cross magnetization

All of these

magnetization

demagnetization

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A dc shunt motor runs at a no-load speed of 1140 rpm. At full load, armature reaction weakens the main flux by 5% whereas the armature circuit voltage drops by 10%. The motor full-load speed in rpm is

1000

1203

1200

1080

1000

1203

1200

1080

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
If the applied voltage of a certain transformer is increased by 50% and the frequency is reduced by 50%, the maximum flux density will (assuming that the magnetic circuit remains unsaturated)

remain the same as the original

changes to 0.5 times the original value

changes to 1.5 times the original value

changes to three times the original value

remain the same as the original

changes to 0.5 times the original value

changes to 1.5 times the original value

changes to three times the original value

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
No load saturation characteristics are plotted between

no load voltage and armature current

short circuit current and armature current

no load voltage and field current

short circuit current and field current

no load voltage and armature current

short circuit current and armature current

no load voltage and field current

short circuit current and field current

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A voltmeter gives 120 oscillations per minute when connected to the rotor of an induction motor. The frequency is 50Hz. The slip of the motor is

5%

25%

2%

4%

5%

25%

2%

4%

ANSWER DOWNLOAD EXAMIANS APP

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 For pure resistive load what is the armature reaction?

Electrical Machines A dc shunt motor runs at a no-load speed of 1140 rpm. At full load, armature reaction weakens the main flux by 5% whereas the armature circuit voltage drops by 10%. The motor full-load speed in rpm is

Electrical Machines If the applied voltage of a certain transformer is increased by 50% and the frequency is reduced by 50%, the maximum flux density will (assuming that the magnetic circuit remains unsaturated)

Electrical Machines No load saturation characteristics are plotted between

Electrical Machines A voltmeter gives 120 oscillations per minute when connected to the rotor of an induction motor. The frequency is 50Hz. The slip of the motor is

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
For pure resistive load what is the armature reaction?

Electrical Machines
A dc shunt motor runs at a no-load speed of 1140 rpm. At full load, armature reaction weakens the main flux by 5% whereas the armature circuit voltage drops by 10%. The motor full-load speed in rpm is

Electrical Machines
If the applied voltage of a certain transformer is increased by 50% and the frequency is reduced by 50%, the maximum flux density will (assuming that the magnetic circuit remains unsaturated)

Electrical Machines
No load saturation characteristics are plotted between

Electrical Machines
A voltmeter gives 120 oscillations per minute when connected to the rotor of an induction motor. The frequency is 50Hz. The slip of the motor is