Transformers MCQ Questions Answers Electrical Engineering

Transformers Electrical Engineering MCQ Questions Answers

Transformers are fundamental components in electrical engineering that play a crucial role in voltage transformation, power distribution, and isolation. Aspiring electrical engineers and professionals in the field need a solid understanding of transformers and their principles. To assist in mastering this subject, we have compiled a set of Multiple Choice Questions (MCQs) along with their detailed answers.

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1) A transformer will work on……….

a) a.c only

b) d.c only

c) a.c as well as d.c

d) none of the above

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2) A transformer does not posses ……..changing property.

a) impedance

b) voltage

c) current

d) power

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3) An ideal transformer is one which ……….

a) has no losses and leakage reactance

b) does not work

c) has same number of primary and secondary turns

d) none of the above

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4) The primary leakage flux links ………

a) primary winding only

b) secondary winding only

c) both primary and secondary windings

d) none of the above

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5) The amount of copper in the primary is ……. That of secondary.

a) about the same as

b) greater than

c) smaller than

d) none of the above

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6) When load on a transformer is increased, the eddy current ……….

a) is increased

b) remains unchanged

c) is decreased

d) none of the above

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7) The approximate efficiency of a large transformer is ………

a) 65%

b) 50%

c) 80%

d) 95%

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8) A transformer has 200 W as iron loss at full-load. The iron loss at half full-load will be …….

a) 50 W

b) 100 W

c) 400 W

d) 200 W

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9) Transformers having rating less than 5 k VA  are generally……..

a) oil cooled

b) natural cooled

c) water cooled

d) none of the above

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10) The secondary load impedance of a step-up transformer is Z_s the primary impedance Z_p will be

a) equal to Z_s

b) greater than Z_s

c) less than Z_s

d) none of the above