SET 4: Electromagnetic Induction and Electric Generators
Introduction: This set deals with electromagnetic induction, Faraday's discoveries, AC and DC generators, and the differences between alternating and direct current. Questions cover the principles and applications of generators.
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📘 SCIENCE
PHYSICS | Magnetic Effects of Electric Current-D
📝 Questions: 50
⏱️ Timer: 20 min
Q1. Electromagnetic induction was discovered by:
Q2. Electric generators work on the principle of:
Q3. The direction of induced current depends on the:
Q4. A moving magnet near a coil produces:
Q5. Electromagnetic induction occurs when there is a change in:
Q6. When the magnet stops moving, the galvanometer deflection becomes:
Q7. Induced current exists only when there is:
Q8. The phenomenon of producing current by moving a magnet is called:
Q9. When the magnet is withdrawn, the current induced in the coil flows in:
Q10. When the magnet moves towards the coil, the galvanometer shows:
Q11. DC generator differs from AC generator mainly in the use of:
Q12. Slip rings in a generator are internally attached to the:
Q13. When both the coil and the magnet are stationary, the galvanometer shows:
Q14. Induced potential difference in a circuit sets up:
Q15. Most power stations generate:
Q16. The polarity of induced current in an AC generator changes after:
Q17. Alternating current reverses its direction:
Q18. The function of brushes in a generator is to:
Q19. Induced current can be produced by:
Q20. Changing magnetic field around a conductor induces:
Q21. The direction of induced current is given by:
Q22. For zero current, the galvanometer pointer remains at:
Q23. Motion of a magnet with respect to a coil produces:
Q24. What is the principle of working of an electric generator?
Q25. The galvanometer deflects left or right depending on the:
Q26. In a DC generator, a _____ is used to obtain unidirectional current.
Q27. Induced current is maximum when the motion of coil is:
Q28. When the magnet and coil are stationary relative to each other, induced current is:
Q29. If the south pole of the magnet is moved towards the coil, the galvanometer deflection is:
Q30. AC changes direction after every:
Q31. In Fleming's right-hand rule, the middle finger represents the direction of:
Q32. Deflection in galvanometer indicates the presence of:
Q33. Faraday discovered electromagnetic induction in the year:
Q34. In Fleming's right-hand rule, the forefinger represents the direction of:
Q35. In India, the frequency of AC is:
Q36. Direct current always flows in:
Q37. The ends of the generator coil are connected to:
Q38. A galvanometer can detect:
Q39. Fleming's right-hand rule is used to determine the direction of:
Q40. In an electric generator, the rotating coil is placed between:
Q41. In an AC generator, the current changes direction after every:
Q42. When current in coil-1 becomes steady, the galvanometer in coil-2 shows:
Q43. Changing current in a nearby coil produces current in another coil due to change in:
Q44. In Fleming's right-hand rule, the thumb shows the direction of:
Q45. Electromagnetic induction is caused by:
Q46. An important advantage of AC over DC is:
Q47. Current produced by an AC generator is called:
Q48. An electric generator converts:
Q49. When the coil is moved away from the magnet, the galvanometer needle deflects:
Q50. Electromagnetic induction requires:
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