Magnetism

1. The region or space where magnetic influence is felt is called?

Question 1 of 37

2. Destroying the magnetic properties of a magnet is called?

Question 2 of 37

3. Why are electrical measuring instruments and watches covered by soft iron rings?

Question 3 of 37

4. What happens when you heat a magnet?

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5. Define ferromagnetic materials

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6. A magnet is an object which attracts magnetic materials such as cobalt, iron and nickel.

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7. Which of the following methods is the sure test for polarity?

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8. Magnetic shielding is a property of certain materials to concentrate magnetic field hence leaving some areas totally free of magnetic influence?

Question 8 of 37

9. A material is said to be magnetized when most of its domains are aligned in 1 direction?

Question 9 of 37

10. A material is said to be magnetically saturated when:-

Question 10 of 37

11. The direction of the magnetic field at a point is the direction which a free North Pole would move if placed at that point in the field?

Question 11 of 37

12. Which of the following is not a method of magnetization?

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13. Define the basic law of magnetism

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14. How can you test the polarity of a magnet?

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15. A magnetic field line originates from the North Pole and ends at the South Pole. True or False?

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16. Which of the following method is not a demagnetization method?

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17. Which of the following is not an application of a magnet?

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18. Why are magnets placed in an East-West direction when they are being demagnetized?

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19. Which of the following statements is correct about a magnetic field?

Question 19 of 37

20. In the stroking method of magnetisation, the end of the material i.e. needle where the magnet finishes the stroking pattern acquires an opposite polarity to that of the stroking end of the magnet?

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21. State the Clock rule

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22. Attraction in a magnet only occurs:-

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23. Explain how you can demagnetize a magnet using hammering method?

Question 23 of 37

24. Magnetic materials which are difficult to magnetize but once magnetized retain their magnetism for a long time are said to be:-

Question 24 of 37

25. A magnet whose field lines are more concentrated means?

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26. Name the biggest disadvantage of the stroking method of magnetism?

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27. Which of the following is not a property of magnets

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28. Magnetic materials which are magnetized easily but do not retain their magnetism are said to be:-

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29. Define the neutral point?

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30. Which of the following is not true when a material like a pin is magnetized by induction method?

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31. What is the importance of keepers in the storage of magnets?

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32. The path along which a north pole would move if free to do so is called?

Question 32 of 37

33. Why is repulsion the only sure test of polarity of an unknown Magnet?

Question 33 of 37

34. Name two ways in which the polarity of a material which has been magnetized by electrical method can be determined?

Question 34 of 37

35. Which of the following statements is INCORRECT about the domain theory?

Question 35 of 37

36. State the Right-Hand Grip rule as applied to electromagnets

Question 36 of 37

37. Which of the following is NOT true about magnetic field lines?

Question 37 of 37