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Electronics Worksheet: Conductors and Insulators

Electronics lesson 3: Conductors and insulators · Set 82 · 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 is the odd one out? (a) an iron nail (b) a wooden stick (c) a graphite rod (d) a copper wire
  2. 2.🔦 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
  3. 3.Which of these is a conductor? (a) a glass marble (b) a dry cork (c) a steel spoon (d) a rubber eraser
  4. 4.Which of these is an insulator? (a) a plastic straw (b) a graphite rod (c) aluminium foil (d) an iron nail
  5. 5.🔍 Which is the odd one out? (a) a woollen thread (b) a brass key (c) a wooden stick (d) a dry cork
  6. 6.🔌 Which metal is used for most electric wires at home? (a) plastic (b) rubber (c) copper (d) glass
  7. 7.🔍 Which is the odd one out? (a) a metal paper clip (b) a cotton thread (c) a plastic straw (d) a glass marble
  8. 8.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic is a conductor (c) plastic is an insulator (d) plastic makes current
  9. 9.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
  10. 10.Which of these is a conductor? (a) a dry cork (b) a plastic ruler (c) a brass key (d) a wooden stick
  11. 11.🔌 Most metals are good … (a) insulators (b) magnets only (c) batteries (d) conductors
  12. 12.Which of these is a conductor? (a) a rubber eraser (b) a copper wire (c) a ceramic cup (d) a cotton thread
  13. 13.🔦 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) No (b) Yes
  14. 14.True or false: a steel spoon is a conductor. (a) False (b) True
  15. 15.🔌 Which part of a screwdriver should an electrician hold? (a) the steel shaft (b) the metal tip (c) the plastic handle (d) the bare end
  16. 16.True or false: a dry cork is an insulator. (a) True (b) False
  17. 17.🔌 Is a steel coin a conductor or an insulator? (a) a conductor (b) an insulator
  18. 18.Which of these is an insulator? (a) a safety pin (b) a graphite rod (c) aluminium foil (d) a plastic ruler
  19. 19.🔌 Is a plastic ruler a conductor or an insulator? (a) a conductor (b) an insulator
  20. 20.Which of these is a conductor? (a) an iron nail (b) a plastic ruler (c) a wooden stick (d) a glass marble
  21. 21.🔍 Which is the odd one out? (a) a steel spoon (b) a glass marble (c) a dry cork (d) a plastic ruler
  22. 22.🔌 Is a glass marble a conductor or an insulator? (a) an insulator (b) a conductor
  23. 23.🔌 Is a woollen thread a conductor or an insulator? (a) an insulator (b) a conductor
  24. 24.🔍 Which is the odd one out? (a) a copper wire (b) a plastic ruler (c) a graphite rod (d) an iron nail
  25. 25.Which of these is a conductor? (a) a cotton thread (b) a metal paper clip (c) a dry cork (d) a plastic ruler
  26. 26.True or false: a woollen thread is an insulator. (a) True (b) False
  27. 27.Which of these is a conductor? (a) a steel coin (b) a plastic ruler (c) a rubber eraser (d) a glass marble
  28. 28.🔌 Is a rubber band a conductor or an insulator? (a) a conductor (b) an insulator
  29. 29.🔌 Is a brass key a conductor or an insulator? (a) an insulator (b) a conductor
  30. 30.🔌 Is a steel spoon a conductor or an insulator? (a) an insulator (b) a conductor
  31. 31.Which of these is an insulator? (a) a steel coin (b) a safety pin (c) a glass marble (d) a graphite rod
  32. 32.True or false: an iron nail is an insulator. (a) True (b) False
  33. 33.True or false: an iron nail is a conductor. (a) True (b) False
  34. 34.True or false: aluminium foil is an insulator. (a) True (b) False
  35. 35.🔍 Which is the odd one out? (a) a brass key (b) aluminium foil (c) a ceramic cup (d) a steel spoon
  36. 36.🔦 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) Yes (b) No
  37. 37.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) an insulator (c) a cell (d) a switch that is ON
  38. 38.True or false: a cotton thread is an insulator. (a) True (b) False
  39. 39.🔌 Is a ceramic cup a conductor or an insulator? (a) a conductor (b) an insulator
  40. 40.🔍 Which is the odd one out? (a) a glass marble (b) a steel coin (c) a steel spoon (d) a graphite rod

Answer key

  1. a wooden stick
  2. Yes
  3. a steel spoon
  4. a plastic straw
  5. a brass key
  6. copper
  7. a metal paper clip
  8. plastic is an insulator
  9. a conductor
  10. a brass key
  11. conductors
  12. a copper wire
  13. Yes
  14. True
  15. the plastic handle
  16. True
  17. a conductor
  18. a plastic ruler
  19. an insulator
  20. an iron nail
  21. a steel spoon
  22. an insulator
  23. an insulator
  24. a plastic ruler
  25. a metal paper clip
  26. True
  27. a steel coin
  28. an insulator
  29. a conductor
  30. a conductor
  31. a glass marble
  32. False
  33. True
  34. False
  35. a ceramic cup
  36. Yes
  37. an insulator
  38. True
  39. an insulator
  40. a glass marble

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