Magnet Quiz Time to Test Your KNOWLEDGE

1. Magnet QuizTime to Test Your KNOWLEDGE Chapter 10

2. 1. An example of a naturally occuring magnetic rock is • A. lodestone • B. soapstone • C. limestone • D. Peastone

3. 2. The north pole of one magnet will be… • A. attracted to the north pole of another magnet • B. attracted to the south pole of the same magnet • C. repelled by the north pole of another magnet • D. repelled by the south pole of another magnet

4. 3. Like magnet poles always • A. repel each other • B. attract each other • C. cancel out each other’s magnetic field • D. point toward the north pole

5. 4. The magnetism of a piece of magnetized iron can be weakened by… • A. heating the iron and hammering it • B. putting it near a piece of un-magnetized iron • C. bending the iron • D. none of the above

6. 5. Magnetic Force • A. is strongest near a magnet’s pole • B. is a field force • C. acts at a distance • D. All of the above

7. 6. Magnetic fields exist • A. near a magnet • B. farther away from a magnet • C. within a magnet • D. all of the above

8. 7. What material was used as the first magnet? • A. lodestone • B. limestone • C. iron • D. Steel

9. 8. What instrument is used to trace the direction of a magnetic field? • A. lodestone • B. limestone • C. compass • D. needle

10. 9. Magnetic Fields are produced by… • A. magnetic forces • B. electric currents • C. gravitational forces • D. water currents

11. 10. The strength of a magnetic field created by current in a wire can be increased by… • A. increasing the current in a wire • B. decreasing the current in a wire • C. using longer wire • D. wrapping the wire into a coil

12. 11. In a magnetized substance, the domains… • A. are randomly distributed • B. line up more uniformly in one direction • C. cancel each other • D. can never be reoriented

13. 12. A device that converts electric energy into mechanical energy is a(n) • A. generator • B. electric motor • C. commutator • D. transformer

14. 13. An electric motor and a generator are similar in that both … • A. use electricity • B. produce mechanical energy • C. transform energy into a different form • D. create energy

15. 14. Generators convert…. • A. mechanical energy to electrical energy • B. electrical energy to mechanical energy • C. chemical energy to electrical energy • D. electrical energy to chemical energy

16. 15. A ________________ magnet retains its magnetic properties at all times.

17. 16. Magnets exert _____________ on one another when they are close together.

18. 17. A magnet will point north/south on the Earth because the Earth’s core acts like a ___________.

19. 18. The north pole of a magnet points to the magnetic __________ pole of the Earth.

20. 19. A current carrying wire coiled around an iron rod creates an __________________.

21. 20. Applying more voltage, increasing coils and increasing the amount of iron in the coil __________________ the strength of the electromagnet.

22. 21. What mineral does magnetic rock contain?

23. Check your Answers

24. 1. An example of a naturally occuring magnetic rock is • A. lodestone • B. soapstone • C. limestone • D. Peastone

25. 2. The north pole of one magnet will be… • A. attracted to the north pole of another magnet • B. attracted to the south pole of the same magnet • C. repelled by the north pole of another magnet • D. repelled by the south pole of another magnet

26. 3. Like magnet poles always • A. repel each other • B. attract each other • C. cancel out each other’s magnetic field • D. point toward the north pole

27. 4. The magnetism of a piece of magnetized iron can be weakened by… • A. heating the iron and hammering it • B. putting it near a piece of un-magnetized rion • C. bending the iron • D. none of the above

28. 5. Magnetic Force • A. is strongest near a magnet’s pole • B. is a field force • C. acts at a distance • D. All of the above

29. 6. Magnetic fields exist • A. near a magnet • B. farther away from a magnet • C. within a magnet • D. all of the above

30. 7. What material was used as the first magnet? • A. lodestone • B. limestone • C. iron • D. Steel

31. 8. What instrument is used to trace the direction of a magnetic field? • A. lodestone • B. limestone • C. compass • D. needle

32. 9. Magnetic Fields are produced by… • A. magnetic forces • B. electric currents • C. gravitational forces • D. water currents

33. 10. The strength of a magnetic field created by current in a wire can be increased by… • A. increasing the current in a wire • B. decreasing the current in a wire • C. using longer wire • D. wrapping the wire into a coil

34. 11. In a magnetized substance, the domains… • A. are randomly distributed • B. line up more uniformly in one direction • C. cancel each other • D. can never be reoriented

35. 12. A device that converts electric energy into mechanical energy is a(n) • A. generator • B. electric motor • C. commutator • D. transformer

36. 13. An electric motor and a generator are similar in that both … • A. use electricity • B. produce mechanical energy • C. transform energy into a different form • D. create energy

37. 14. Generators convert…. • A. mechanical energy to electrical energy • B. electrical energy to mechanical energy • C. chemical energy to electrical energy • D. electrical energy to chemical energy

38. 15. A ________________ magnet retains its magnetic properties at all times. • Permanent

39. 16. Magnets exert _____________ on one another when they are close together. • Forces

40. 17. A magnet will point north/south on the Earth because the Earth’s core acts like a ___________. • magnet

41. 18. The north pole of a magnet points to the magnetic __________ pole of the Earth. • south

42. 19. A current carrying wire coiled around an iron rod creates an __________________. • Electromagnet

43. 20. Applying more voltage, increasing coils and increasing the amount of iron in the coil __________________ the strength of the electromagnet. • increases

44. 21. What mineral does magnetic rock contain? • magnetite