Electromagnetic Induction

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

Question 1 of 25

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

Question 2 of 25

3. What is the main assumption in TURNS RULE?

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

Question 4 of 25

5. 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 5 of 25

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

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

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

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

Question 9 of 25

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

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

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

Question 12 of 25

13. 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 13 of 25

14. State Faradays Law of Electromagnetic induction?

Question 14 of 25

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

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

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

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18. State Lenz Law

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

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

Question 20 of 25

21. Define transformers?

Question 21 of 25

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

Question 22 of 25

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

Question 23 of 25

24. Give the formula of Turns RATIO

Question 24 of 25

25. 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 25 of 25