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Transformers

Transformers
The noise produced by a transformer is termed as

zoom
hum
buzz
ringing

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Transformers
We can find _______of the transformer with open circuit test.

Total equivalent resistance
Copper losses
Turn ratio
Total equivalent leakage reactance

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Transformers
By laminating the core of a transformer, we decrease _____

Leakage reactance
Eddy current loss
Hysteresis loss
Copper loss

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Transformers
Harmonics in transformer result in

increased I2R losses
All of the listed here
magnetic interference with communication circuits
increased core losses

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Transformers
The turns ratio required to match an 80 source to a 320 load is

4
2
80
20

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Transformers
Sumpner's test is conducted on transformers to determine

temperature
stray losses
all-day efficiency
None of these

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