Magnetism

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

Question 1 of 37

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

Question 2 of 37

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

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5. Attraction in a magnet only occurs:-

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

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7. What happens when you heat a magnet?

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8. State the Clock rule

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

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

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

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12. 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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13. A magnet whose field lines are more concentrated means?

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

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

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

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17. 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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18. Define the basic law of magnetism

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

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

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21. Define ferromagnetic materials

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

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

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

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

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

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

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

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

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

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

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33. Define the neutral point?

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

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

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

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

Question 37 of 37