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Transformers

Transformers
The noise produced by a transformer is termed as

hum
buzz
zoom
ringing

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

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

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Transformers
Short circuit test on transformers is conducted to determine

eddy current losses
core losses
copper losses
hysteresis losses

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Transformers
Open circuit test on transformers is conducted to determine

copper losses
core losses
eddy current losses
hysteresis losses

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Transformers
In a certain transformer, the input power to the primary is 120 W. If 8.5 W are lost to the winding resistance, what is the output power to the load, neglecting any other issues?

1,020 W
0 W
14.1 W
111.5 W

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Transformers
A step up transformer increases

Voltage
Power
Frequency
Current

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