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Transformers

Transformers
Noise level test in a transformer is a

routine test
None of these
type test
special test

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Transformers
Primary winding of a transformer

is always a high voltage winding
is always a low voltage winding
could either be a low voltage or high voltage winding
None of these

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Transformers
The mutual inductance when k = 0.65, L1 = 2 H, and L2 = 5 H is

2 μH
2 mH
8 μH
4 μH

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Transformers
If 25 W of power are applied to the primary of an ideal transformer with a turns ratio of 10, the power delivered to the secondary load is

2.5 W
25 W
250 W
0 W

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Transformers
In the short circuit test on a transformer, we generally short circuit ______

Low voltage winding
High voltage winding
Either low or high voltage winding
None of the listed here

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Transformers
In a transformer routine efficiency depends upon

Both power factor and load current
Supply frequency
Power factor of load
Load current

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