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Electronics Worksheet: Conductors and Insulators

Electronics lesson 3: Conductors and insulators · Set 79 · 40 questions
TalentJR

Remember (Metal passes, plastic blocks): Conductors: metals (copper, iron, steel, aluminium, brass) and graphite. Insulators: rubber, plastic, wood, glass, paper, cotton, wool, cork, ceramic and dry air. Tester: put the object across the gap — the bulb glows only for a conductor.

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  1. 1.Which of these is a conductor? (a) a steel coin (b) a woollen thread (c) a glass marble (d) a paper strip
  2. 2.🔍 Which is the odd one out? (a) a rubber band (b) a glass marble (c) a cotton thread (d) an iron nail
  3. 3.Which of these is an insulator? (a) an iron nail (b) a safety pin (c) a copper wire (d) a rubber band
  4. 4.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) plastic makes current (c) plastic is an insulator (d) to make them heavy
  5. 5.🔍 Which is the odd one out? (a) a graphite rod (b) a wooden stick (c) a cotton thread (d) a glass marble
  6. 6.🔌 Is a steel coin a conductor or an insulator? (a) an insulator (b) a conductor
  7. 7.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic ruler across the gap. Does the bulb glow? (a) Yes (b) No
  8. 8.🔍 Which is the odd one out? (a) a ceramic cup (b) a cotton thread (c) a copper wire (d) a dry cork
  9. 9.🔌 Is aluminium foil a conductor or an insulator? (a) a conductor (b) an insulator
  10. 10.True or false: a ceramic cup is a conductor. (a) True (b) False
  11. 11.Which of these is an insulator? (a) a graphite rod (b) a metal paper clip (c) a glass marble (d) an iron nail
  12. 12.Which of these is an insulator? (a) a metal paper clip (b) a wooden stick (c) a steel coin (d) a brass key
  13. 13.Which of these is a conductor? (a) a plastic ruler (b) a wooden stick (c) a copper wire (d) a plastic straw
  14. 14.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel spoon across the gap. Does the bulb glow? (a) No (b) Yes
  15. 15.Which of these is a conductor? (a) a plastic straw (b) a cotton thread (c) a brass key (d) a rubber band
  16. 16.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) No (b) Yes
  17. 17.🔌 Is a steel spoon a conductor or an insulator? (a) an insulator (b) a conductor
  18. 18.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a woollen thread across the gap. Does the bulb glow? (a) Yes (b) No
  19. 19.Which of these is a conductor? (a) a safety pin (b) a ceramic cup (c) a rubber eraser (d) a rubber band
  20. 20.True or false: a brass key is a conductor. (a) False (b) True
  21. 21.Which of these is an insulator? (a) an iron nail (b) a steel spoon (c) a plastic straw (d) a graphite rod
  22. 22.True or false: aluminium foil is an insulator. (a) True (b) False
  23. 23.🔌 Most metals are good … (a) batteries (b) magnets only (c) conductors (d) insulators
  24. 24.🔌 Which metal is used for most electric wires at home? (a) rubber (b) plastic (c) copper (d) glass
  25. 25.🔌 Is a copper wire a conductor or an insulator? (a) an insulator (b) a conductor
  26. 26.🔍 Which is the odd one out? (a) a brass key (b) a metal paper clip (c) a graphite rod (d) a rubber band
  27. 27.True or false: a dry cork is an insulator. (a) False (b) True
  28. 28.🔍 Which is the odd one out? (a) aluminium foil (b) a cotton thread (c) a steel spoon (d) a metal paper clip
  29. 29.🔌 Is a safety pin a conductor or an insulator? (a) a conductor (b) an insulator
  30. 30.True or false: a rubber band is a conductor. (a) True (b) False
  31. 31.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put an iron nail across the gap. Does the bulb glow? (a) No (b) Yes
  32. 32.🔌 Is a metal paper clip a conductor or an insulator? (a) a conductor (b) an insulator
  33. 33.True or false: a glass marble is an insulator. (a) True (b) False
  34. 34.True or false: a steel spoon is a conductor. (a) True (b) False
  35. 35.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a wooden stick across the gap. Does the bulb glow? (a) Yes (b) No
  36. 36.True or false: a ceramic cup is an insulator. (a) False (b) True
  37. 37.🔍 Which is the odd one out? (a) a woollen thread (b) a steel spoon (c) aluminium foil (d) a safety pin
  38. 38.True or false: a glass marble is a conductor. (a) False (b) True
  39. 39.Which of these is a conductor? (a) a woollen thread (b) a glass marble (c) aluminium foil (d) a paper strip
  40. 40.Which of these is an insulator? (a) a metal paper clip (b) a woollen thread (c) a safety pin (d) aluminium foil

Answer key

  1. a steel coin
  2. an iron nail
  3. a rubber band
  4. plastic is an insulator
  5. a graphite rod
  6. a conductor
  7. No
  8. a copper wire
  9. a conductor
  10. False
  11. a glass marble
  12. a wooden stick
  13. a copper wire
  14. Yes
  15. a brass key
  16. No
  17. a conductor
  18. No
  19. a safety pin
  20. True
  21. a plastic straw
  22. False
  23. conductors
  24. copper
  25. a conductor
  26. a rubber band
  27. True
  28. a cotton thread
  29. a conductor
  30. False
  31. Yes
  32. a conductor
  33. True
  34. True
  35. No
  36. True
  37. a woollen thread
  38. False
  39. aluminium foil
  40. a woollen thread

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