Magnetism

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

Question 1 of 37

2. Define the basic law of magnetism

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

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

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

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6. What happens when you heat a magnet?

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

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

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

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

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

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12. Attraction in a magnet only occurs:-

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

Question 13 of 37

14. 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?

Question 14 of 37

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

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

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

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

Question 18 of 37

19. 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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20. 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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21. State the Clock rule

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22. Define ferromagnetic materials

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

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24. 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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25. How can you test the polarity of a magnet?

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

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

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

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

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

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

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

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33. Define the neutral point?

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

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35. Why is repulsion the only sure test of polarity of an unknown 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. Name two ways in which the polarity of a material which has been magnetized by electrical method can be determined?

Question 37 of 37