Magnetism

1. What happens when you heat a magnet?

Question 1 of 37

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

Question 2 of 37

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

Question 3 of 37

4. 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?

Question 4 of 37

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

Question 5 of 37

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

Question 6 of 37

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

Question 7 of 37

8. State the Clock rule

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

Question 9 of 37

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

Question 10 of 37

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

Question 11 of 37

12. Define the neutral point?

Question 12 of 37

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

Question 13 of 37

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

Question 14 of 37

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

Question 15 of 37

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

Question 16 of 37

17. Define ferromagnetic materials

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

Question 18 of 37

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

Question 19 of 37

20. Define the basic law of magnetism

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

Question 21 of 37

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

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

Question 23 of 37

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

Question 24 of 37

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

Question 25 of 37

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

Question 26 of 37

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

Question 27 of 37

28. Attraction in a magnet only occurs:-

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

Question 29 of 37

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

Question 30 of 37

31. 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 31 of 37

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

Question 32 of 37

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

Question 33 of 37

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

Question 34 of 37

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

Question 35 of 37

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

Question 36 of 37

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

Question 37 of 37