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Electronics Worksheet: Conductors and Insulators

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

Answer key

  1. a plastic straw
  2. a conductor
  3. a steel spoon
  4. copper
  5. True
  6. aluminium foil
  7. No
  8. plastic is an insulator
  9. an insulator
  10. an insulator
  11. a glass marble
  12. False
  13. False
  14. a plastic ruler
  15. conductors
  16. a paper strip
  17. aluminium foil
  18. False
  19. a safety pin
  20. Yes
  21. the plastic handle
  22. a rubber eraser
  23. a conductor
  24. Yes
  25. a cotton thread
  26. True
  27. Yes
  28. an insulator
  29. True
  30. Yes
  31. a woollen thread
  32. an insulator
  33. a conductor
  34. an insulator
  35. a copper wire
  36. True
  37. No
  38. a conductor
  39. Yes
  40. No

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