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Transformers

Transformers
The noise resulting from vibrations of laminations set by magnetic forces, is termed as

Boo
Hum
Zoom
Magnetostriction

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Transformers
The winding of the transformer with greater number of turns will be _____

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

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Transformers
How many primary volts must be applied to a transformer with a turns ratio of 0.1 to obtain a secondary voltage of 9 V?

0.9 V
90 V
900 V
9 V

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Transformers
The dielectric strength of transformer oil is expected to be

330 kV
lkV
100 kV
33 kV

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

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

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Transformers
In a certain loaded transformer, the secondary voltage is one-fourth the primary voltage. The secondary current is

one-fourth the primary current and equal to the primary current
one-fourth the primary current
equal to the primary current
four times the primary current

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