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Alternators

Alternators
When the speed of an alternator is reduced by half, the generated emf will become

One-fourth
Twice
Half
Four times

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Alternators
For producing an emf of given frequency, an alternator will run at greatest speed for _____ poles.

4
8
12
2

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Alternators
Alternators are usually design to generate

Definite currents
Definite frequencies
Definite power factor
Variable frequncies

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Alternators
In case of a uniformly distributed winding, the value of distribution factor is

0.85
0.65
0.76
0.995

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Alternators
In an alternator the armature reaction is mainly influenced by

Speed of the alternator
The power factor of the load
Short circuit ratio
Total current drawn

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Alternators
The number of poles in turbo alternators is usually

2
50
12
4

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