Magnetism

1. 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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2. What is the importance of keepers in the storage of magnets?

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

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

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6. State the Clock rule

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

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

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

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

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11. Define ferromagnetic materials

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

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

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

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

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16. Define the basic law of magnetism

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

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

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

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20. Attraction in a magnet only occurs:-

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

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

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

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24. What happens when you heat a magnet?

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

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

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

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

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

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32. Define the neutral point?

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

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

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

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

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

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