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Home >> Electrical Machines-Transformer MCQ-1

Electrical Machines-Transformer MCQ-1 Question 1:-


The basic function of a transformer is to change

(a) the level of the voltage.
(b) the power level.
(c) the power factor.
(d) the frequency.

Ans: (a) the level of the voltage.

Electrical Machines-Transformer MCQ Question 2:-


In a transformer, electrical power is transferred from primary to secondary

(a) through air.
(b) by magnetic flux.
(c) through an insulating medium.
(d) none of these.

Ans: (b) by magnetic flux.

Electrical Machines-Transformer MCQ Question 3:-


The efficiency of a power transformer is around

(a) 50%.
(b) 60%.
(c) 80%.
(d) 95%

Ans: (d) 95%

Electrical Machines-Transformer MCQ Question 4:-


Transformer action requires a

(a) constant magnetic flux.
(b) increasing magnetic flux.
(c) alternating magnetic flux.
(d) alternating electric flux.

Ans: (c) alternating magnetic flux. ✔

Transformer action requires a alternating magnetic flux.

Electrical Machines-Transformer MCQ Question 5:-


The two windings of a transformer are

(a) conductively linked.
(b) inductively linked.
(c) not linked at all.
(d) electrically linked.

Ans: (b) inductively linked. ✔

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