Electromagnetic Induction

1. Which of the following statements is CORRECT about step down transformers?

Question 1 of 25

2. What is the main assumption in TURNS RULE?

Question 2 of 25

3. Give the important factors necessary for an induced E.M.F to flow in a conductor

Question 3 of 25

4. How do you reduce the heating effect caused in the coils of a transformer which increases electrical resistance?

Question 4 of 25

5. What is the power input for the primary source in a transformer?

Question 5 of 25

6. Whenever there is relative motion between a magnetic field and a conductor then an induced current resulting from an induced E.M.F flows in the conductor. True or False?

Question 6 of 25

7. Mention the ways in which you can increase the mutual induced E.M.F on a secondary coil

Question 7 of 25

8. How do you reduce eddy currents in the core of transformers?

Question 8 of 25

9. Mention the type of energy loss in a transformer experienced when the magnetic flux produced by the primary coil is not all linked with the secondary coil, hence reducing the induced E.M.F in the secondary?

Question 9 of 25

10. Define transformers?

Question 10 of 25

11. Mutual induction occurs when a changing current in one coil induces current in another placed close to it?

Question 11 of 25

12. Which of the following statement is INCORRECT about step up transformers?

Question 12 of 25

13. Which of the following is NOT among the application of electromagnetic induction?

Question 13 of 25

14. The equation of Turns Rule shows that: (secondary voltage )/(primary voltage ) = (no.of secondary turns )/(no.of primary turns) = (Vs )/(Vp ) = (Ns )/(Np ). True or False?

Question 14 of 25

15. Mention the factors which affect the magnitude of induced E.M.F

Question 15 of 25

16. How do you increase the induced E.M.F or current for both a.c and d.c generators?

Question 16 of 25

17. State Faradays Law of Electromagnetic induction?

Question 17 of 25

18. State Lenz Law

Question 18 of 25

19. What is the power input for the secondary source in a transformer?

Question 19 of 25

20. Which of the following is not among the energy losses experienced in a transformer?

Question 20 of 25

21. How do you minimize hysteresis loss in a transformer core?

Question 21 of 25

22. In a step down transformer secondary current Is is greater than the primary current Ip?

Question 22 of 25

23. The efficiency of a transformer = (power output)/(power input) x 100. True or False?

Question 23 of 25

24. In a step up transformer primary current Ip is greater than the secondary current Is?

Question 24 of 25

25. Give the formula of Turns RATIO

Question 25 of 25