A belt-driven cumulatively-compound dc generator is delivering power to the dc mains. If the Belt snaps then the machine will run as a

Electrical Machines
A belt-driven cumulatively-compound dc generator is delivering power to the dc mains. If the Belt snaps then the machine will run as a

cumulative compounded motor in the same direction

cumulative compounded motor in opposite direction

differentially compounded motor in the same direction

differentially compounded motor in the opposite direction

cumulative compounded motor in the same direction

cumulative compounded motor in opposite direction

differentially compounded motor in the same direction

differentially compounded motor in the opposite direction

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Electrical Machines
For successful parallel operation of two single phase transformers, the most essential condition is that their

KVA ratings are equal

turn- ratios are exactly equal

polarities are properly connected

percentage impedances are equal

KVA ratings are equal

turn- ratios are exactly equal

polarities are properly connected

percentage impedances are equal

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Electrical Machines
In a dc machine, 1. physically, the brush axis is along the direct axis 2. physically, the brush axis is along the interpolar axis 3. schematically, the brush axis is along the direct axis 4. schematically, the brush axis is along the quadrature axis 5. armaturemmf is directed along the brush axis From these, the correct statements are

1 , 3, 5

1, 4,5

2, 4, 5

2, 3, 5

1 , 3, 5

1, 4,5

2, 4, 5

2, 3, 5

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Electrical Machines
The basic function of a transformer is to change

the power level

the power factor

the frequency

the level of the voltage

the power level

the power factor

the frequency

the level of the voltage

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Electrical Machines
For an ideal transformer the winding should have

maximum resistance on primary side and least resistance on secondary side

minimum resistance on primary side and maximum resistance on secondary side

no ohmic resistance on either side

equal resistance on primary and secondary side

maximum resistance on primary side and least resistance on secondary side

minimum resistance on primary side and maximum resistance on secondary side

no ohmic resistance on either side

equal resistance on primary and secondary side

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Electrical Machines
Synchronous reactance of an alternator represents

armature reactance and leakage reactance

field winding reactance

All of these

a reactance operating at synchronous speed

armature reactance and leakage reactance

field winding reactance

All of these

a reactance operating at synchronous speed

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Electrical Machines

Electrical Machines A belt-driven cumulatively-compound dc generator is delivering power to the dc mains. If the Belt snaps then the machine will run as a

Electrical Machines For successful parallel operation of two single phase transformers, the most essential condition is that their

Electrical Machines The basic function of a transformer is to change

Electrical Machines For an ideal transformer the winding should have

Electrical Machines Synchronous reactance of an alternator represents

Electrical Machines
A belt-driven cumulatively-compound dc generator is delivering power to the dc mains. If the Belt snaps then the machine will run as a

Electrical Machines
For successful parallel operation of two single phase transformers, the most essential condition is that their

Electrical Machines
The basic function of a transformer is to change

Electrical Machines
For an ideal transformer the winding should have

Electrical Machines
Synchronous reactance of an alternator represents