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Transformers

Transformers
A transformer does not posses ______changing property.

Impedance
Current
Power
Voltage

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Transformers
In an auto transformer, the primary and secondary are _____ coupled.

Only electrically
Magnetically as well as electrically
None of the listed here
Only magnetically

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Transformers
A transformer has a 1:6 turns ratio and a secondary coil load resistance of 470 . The load resistance as seen by the source is

1.3 Ω
7.8 Ω
13 Ω
78 Ω

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

Eddy current loss
Leakage reactance
Hysteresis loss
Copper loss

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

Hum
Boo
Magnetostriction
Zoom

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Transformers
Harmonics in transformer result in

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

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MORE MCQ ON Transformers

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