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Electronics Worksheet: Conductors and Insulators

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

Answer key

  1. a conductor
  2. a conductor
  3. a steel coin
  4. No
  5. a conductor
  6. a cotton thread
  7. a conductor
  8. False
  9. a conductor
  10. a wooden stick
  11. a woollen thread
  12. True
  13. a dry cork
  14. Yes
  15. No
  16. True
  17. a metal paper clip
  18. an insulator
  19. plastic is an insulator
  20. True
  21. False
  22. an insulator
  23. False
  24. an insulator
  25. True
  26. a brass key
  27. False
  28. a conductor
  29. a graphite rod
  30. copper
  31. No
  32. the plastic handle
  33. Yes
  34. an insulator
  35. a plastic straw
  36. No
  37. a steel spoon
  38. a safety pin
  39. an insulator
  40. True

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