1.
1. What is the primary function of an electrical transformer?
2.
2. What type of current does a transformer operate with?
3.
3. The power rating of a transformer is measured in:
4.
4. A step-down transformer has:
5.
5. A transformer works on the principle of:
6.
6. The voltage ratio in a transformer is directly proportional to:
7.
7. If the number of turns in the secondary coil is greater than the number of turns in the primary coil, the transformer is called:
8.
8. In an ideal transformer, the power on the primary side is equal to:
9.
9. A transformer’s efficiency is primarily determined by:
10.
10. The core of a transformer is typically made of:
11.
11. If a transformer operates at full load, the primary and secondary currents are related as:
12.
12. The losses in a transformer can be divided into two categories:
13.
13. The hysteresis loss in a transformer is primarily caused by:
14.
14. Eddy current loss in a transformer can be reduced by:
15.
15. In a transformer, the core is used to:
16.
16. A transformer with a turn’s ratio of 1:10 is:
17.
17. Which of the following is an application of a step-up transformer?
18.
18. In an autotransformer, the primary and secondary windings are:
19.
19. The voltage drop in a transformer depends on:
20.
21. The main cause of energy loss in a transformer is:
21.
22. What is the unit of measurement for transformer rating?
22.
23. What is the core material used in transformers to reduce hysteresis loss?
23.
24. The voltage across the secondary winding of a transformer depends on:
24.
25. If the primary coil of a transformer has 100 turns and the secondary coil has 50 turns, what is the voltage ratio?
25.
26. Which of the following is not a type of transformer?
26.
27. Which transformer is commonly used in the distribution of power in homes?
27.
28. What is the effect of increasing the number of turns in the primary coil of a transformer?
28.
29. The main application of a step-down transformer is:
29.
30. The magnetizing current in a transformer is:
30.
31. In an ideal transformer, the total losses are:
31.
32. The ratio of the primary voltage to secondary voltage in a transformer is equal to:
32.
33. If the efficiency of a transformer is 95%, and the input power is 1000W, the output power will be:
33.
34. The transformer windings are insulated from each other using:
34.
35. What happens to the efficiency of a transformer when the core material is improved?
35.
36. Which of the following transformers is used in the electrical isolation of two circuits?
36.
37. The insulating material used in transformers is typically:
37.
38. A transformer is most efficient at:
38.
39. The primary coil of a transformer is connected to:
39.
40. What is the core loss in a transformer primarily caused by?
