Magnetism

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

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

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3. Define the basic law of magnetism

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

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

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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. Define ferromagnetic materials

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

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

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

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

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

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

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

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

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

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17. Define the neutral point?

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

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

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

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

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22. Attraction in a magnet only occurs:-

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

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24. 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?

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

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

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

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

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

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

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

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

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34. State the Clock rule

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

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

Question 36 of 37

37. What happens when you heat a magnet?

Question 37 of 37