Transformers MCQs - Quiz 1

1. ___ is a device which transforms energy from one circuit to another with a rise or fall in current/voltage.
A) Transformer
B) Motor
C) Generator
D) None of the above

The correct answer is A

2. Transformer transforms electrical power from primary to secondary winding through ___
A) Magnetic medium
B) Mechanical medium
C) Electrical medium

The correct answer is A

3. Transformer never changes ___ of alternating current
A) Current
B) Frequency
C) Voltage

The correct answer is B

4. Transformers are used for ___
A) Increasing or decreasing voltage/current
B) Impedance matching
C) Metering and protection
D) All of above

The correct answer is D

5. Transfomers work on idea of ___
A) Newton’s law
B) Gauss Theorem
C) Faraday’s law of electromagnetic induction
D) Both B & C

The correct answer is C

6. What happens when a transformer is operated at no load?
A) It draws a small current called no load current
B) Core is magnetized
C) Core is slightly heated due to losses
D) All of the above

The correct answer is D

7. Universal transformer equation is ___
A) V1/V2 = N1/N2
B) I1/I2 = N2/N1
C) Both A & B

The correct answer is C

8. Losses occurring in windings of a transformer are called ___
A) Copper losses
B) Eddy current losses
C) Hysteresis losses

The correct answer is A

9. Losses occurring in core of a transformer are called ___
A) Copper losses
B) Eddy current losses
C) Hysteresis losses
D) Both B & C

The correct answer is D

10. Core of a transformer is laminated to reduce ___
A) Copper losses
B) Eddy current losses
C) Hysteresis losses
D) None of above

The correct answer is B