Two generators G1 and G2 are to be operated in parallel to deliver a total current of 60 A. Generator one has a terminal voltage of 280 V on no load and 240 V when supplying 40 A current. Similarly the second generator has a voltage of 300 V when on no load and 240 V when supplying of 50 A of current. The output voltage of each generator will be

Electrical Machines
Two generators G1 and G2 are to be operated in parallel to deliver a total current of 60 A. Generator one has a terminal voltage of 280 V on no load and 240 V when supplying 40 A current. Similarly the second generator has a voltage of 300 V when on no load and 240 V when supplying of 50 A of current. The output voltage of each generator will be

271.7 V.

240 V.

256.4 V.

238.2 V.

271.7 V.

240 V.

256.4 V.

238.2 V.

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Electrical Machines
To get the speed of DC motor more than normal without wastage of electrical energy _____________ is used.

Ward Leonard control.

any of above method.

rheostatic control.

none of above.

Ward Leonard control.

any of above method.

rheostatic control.

none of above.

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Electrical Machines
Armature reaction in a DC machine

is in direct opposition to the main poles.

makes an angle with the main pole axis which is load dependent.

makes an angle of 90° with the main pole axis.

is in the same direction as the main poles.

is in direct opposition to the main poles.

makes an angle with the main pole axis which is load dependent.

makes an angle of 90° with the main pole axis.

is in the same direction as the main poles.

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Electrical Machines
Synchronous reactance of an alternator represents

a reactance operating at synchronous speed

field winding reactance

armature reactance and leakage reactance

All of these

a reactance operating at synchronous speed

field winding reactance

armature reactance and leakage reactance

All of these

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Electrical Machines
In auto transformer if the turn ratio is K, what is the power transferred inductively?

both A and B

K × input power

None of these

(1-K) × input power

both A and B

K × input power

None of these

(1-K) × input power

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Electrical Machines
The total core loss of a 400 V, 50 Hz transformer is 2400W, when it is supplied by 200 V, 25 Hz loss is 800W. Calculate eddy current loss and hysteresis loss?

1600W, 800W

1400W, 1000W

800W, 1600W

1000W , 1400W

1600W, 800W

1400W, 1000W

800W, 1600W

1000W , 1400W

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Electrical Machines

Electrical Machines To get the speed of DC motor more than normal without wastage of electrical energy _____________ is used.

Electrical Machines Armature reaction in a DC machine

Electrical Machines Synchronous reactance of an alternator represents

Electrical Machines In auto transformer if the turn ratio is K, what is the power transferred inductively?

Electrical Machines The total core loss of a 400 V, 50 Hz transformer is 2400W, when it is supplied by 200 V, 25 Hz loss is 800W. Calculate eddy current loss and hysteresis loss?

Electrical Machines
To get the speed of DC motor more than normal without wastage of electrical energy _____________ is used.

Electrical Machines
Armature reaction in a DC machine

Electrical Machines
Synchronous reactance of an alternator represents

Electrical Machines
In auto transformer if the turn ratio is K, what is the power transferred inductively?

Electrical Machines
The total core loss of a 400 V, 50 Hz transformer is 2400W, when it is supplied by 200 V, 25 Hz loss is 800W. Calculate eddy current loss and hysteresis loss?