Magnetism

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

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2. 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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3. Define ferromagnetic materials

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4. Define the neutral point?

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

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

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

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

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

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

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

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

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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. State the Clock rule

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

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

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

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

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21. What happens when you heat a magnet?

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

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

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24. Define the basic law of magnetism

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

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

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

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

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

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

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

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33. Attraction in a magnet only occurs:-

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

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

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

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

Question 37 of 37