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DC Generators

DC Generators
Permeance is the reciprocal of

Ampere turns
Reluctance
Resistance
Flux density

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DC Generators
The coupling field between electrical and mechanical systems of a dc machine is ______

None of the listed here
Both electrical and magnetic fields
Electric field
Magnetic field

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DC Generators
_____ together are called stray losses.

Copper and iron losses
Frictional loss and copper loss
Iron and friction losses
Field copper loss and iron loss

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DC Generators
The terminal voltage of a series generator is 150 V when the load current is 5 A. If the load current is increased to 10 A, the terminal voltage will be

Greater than 150 V
None of these
Less than 150 V
150 V

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DC Generators
In dc generator, the constant losses is equal to

Stray losses
None of the listed here
Stray losses plus shunt cu loss
Mechanical losses

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DC Generators
The yoke of a dc machine is made of

Silicon steel
Cast steel
Soft iron
Aluminum

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