Transformers -Multiple Choice Questions Quiz

Interactive MCQs on “Transformers”:

Solve the following 10 questions. Only one option is correct. Click on the “Submit” button when done. Click on the “embed” button to use this quiz on your website. Click on “WhatsApp” to share this quiz.

Question 1: What is the primary function of a transformer?

(a) To convert electrical energy into mechanical energy
(b) To convert mechanical energy into electrical energy
(c) To step up or step down alternating current (AC) voltage
(d) To generate direct current (DC) voltage

Question 2: Which of the following is NOT a component of a basic transformer?

(a) Core
(b) Windings
(c) Diode
(d) Insulating material

Question 3: In a step-up transformer, the number of turns in the primary winding is _____ than the number of turns in the secondary winding.

(a) Greater
(b) Smaller
(c) Equal
(d) Irrelevant

Question 4: Which type of current is most commonly used in transformers?

(a) Direct current (DC)
(b) Alternating current (AC)
(c) Pulsating current
(d) High-frequency current

Question 5: What is the principle of operation of a transformer?

(a) Electromagnetic repulsion
(b) Electromagnetic induction
(c) Photoelectric effect
(d) Quantum tunneling

Question 6: Which transformer is commonly used to step down the voltage for household appliances?

(a) Step-up transformer
(b) Step-down transformer
(c) Autotransformer
(d) Isolation transformer

Question 7: What is the efficiency of an ideal transformer?

(a) 100%
(b) 75%
(c) 50%
(d) 0%

Question 8: What is the purpose of the core in a transformer?

(a) To provide mechanical support
(b) To reduce electrical resistance
(c) To increase magnetic flux
(d) To decrease the number of windings

Question 9: Which type of transformer has only one winding that serves both as the primary and secondary winding?

(a) Step-up transformer
(b) Step-down transformer
(c) Autotransformer
(d) Isolation transformer

Question 10: Which safety feature is provided by an isolation transformer?

(a) It steps up or steps down voltage as required.
(b) It provides electrical isolation between the primary and secondary circuits.
(c) It automatically shuts off in case of a fault.
(d) It converts AC to DC voltage.