Magnetism

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

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

Question 2 of 37

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

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

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

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7. What happens when you heat a magnet?

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8. Define the basic law of magnetism

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

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

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

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

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

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

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

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

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

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

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

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

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21. Define ferromagnetic materials

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

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

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

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

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

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27. Attraction in a magnet only occurs:-

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28. Define the neutral point?

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

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

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

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

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

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

Question 35 of 37

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

Question 36 of 37

37. State the Clock rule

Question 37 of 37