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Electronics Worksheet: Conductors and Insulators

Electronics lesson 3: Conductors and insulators · Set 72 · 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.True or false: a rubber eraser is an insulator. (a) True (b) False
  2. 2.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a dry cork across the gap. Does the bulb glow? (a) Yes (b) No
  3. 3.Which of these is an insulator? (a) a graphite rod (b) an iron nail (c) a steel spoon (d) a cotton thread
  4. 4.🔍 Which is the odd one out? (a) a steel spoon (b) a dry cork (c) a woollen thread (d) a paper strip
  5. 5.🔌 A gap of dry air between two wires acts as … (a) a cell (b) a switch that is ON (c) an insulator (d) a conductor
  6. 6.🔌 Most metals are good … (a) batteries (b) magnets only (c) conductors (d) insulators
  7. 7.🔦 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
  8. 8.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) Yes (b) No
  9. 9.🔍 Which is the odd one out? (a) a copper wire (b) a woollen thread (c) a ceramic cup (d) a wooden stick
  10. 10.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
  11. 11.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
  12. 12.🔍 Which is the odd one out? (a) a metal paper clip (b) a brass key (c) a rubber eraser (d) a copper wire
  13. 13.True or false: a metal paper clip is an insulator. (a) True (b) False
  14. 14.🔌 Which part of a screwdriver should an electrician hold? (a) the metal tip (b) the steel shaft (c) the bare end (d) the plastic handle
  15. 15.Which of these is a conductor? (a) a wooden stick (b) a dry cork (c) a steel coin (d) a glass marble
  16. 16.Which of these is a conductor? (a) a graphite rod (b) a plastic ruler (c) a paper strip (d) a plastic straw
  17. 17.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a metal paper clip across the gap. Does the bulb glow? (a) No (b) Yes
  18. 18.True or false: a steel spoon is an insulator. (a) False (b) True
  19. 19.🔌 Is a cotton thread a conductor or an insulator? (a) a conductor (b) an insulator
  20. 20.🔌 Is a ceramic cup a conductor or an insulator? (a) a conductor (b) an insulator
  21. 21.🔍 Which is the odd one out? (a) a cotton thread (b) a ceramic cup (c) a woollen thread (d) a metal paper clip
  22. 22.🔍 Which is the odd one out? (a) a copper wire (b) a metal paper clip (c) a brass key (d) a rubber band
  23. 23.Which of these is a conductor? (a) a steel spoon (b) a wooden stick (c) a glass marble (d) a rubber eraser
  24. 24.🔌 Which metal is used for most electric wires at home? (a) rubber (b) copper (c) plastic (d) glass
  25. 25.🔌 Is a steel coin a conductor or an insulator? (a) an insulator (b) a conductor
  26. 26.🔍 Which is the odd one out? (a) a copper wire (b) a graphite rod (c) a brass key (d) a wooden stick
  27. 27.🔦 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
  28. 28.🔌 Is a graphite rod a conductor or an insulator? (a) an insulator (b) a conductor
  29. 29.Which of these is a conductor? (a) a rubber eraser (b) a ceramic cup (c) a wooden stick (d) a metal paper clip
  30. 30.True or false: a cotton thread is a conductor. (a) True (b) False
  31. 31.True or false: a rubber eraser is a conductor. (a) True (b) False
  32. 32.🔌 Is a safety pin a conductor or an insulator? (a) a conductor (b) an insulator
  33. 33.True or false: a dry cork is a conductor. (a) False (b) True
  34. 34.🔌 Is a plastic straw a conductor or an insulator? (a) a conductor (b) an insulator
  35. 35.🔍 Which is the odd one out? (a) a ceramic cup (b) a cotton thread (c) a steel coin (d) a woollen thread
  36. 36.🔌 Is a woollen thread a conductor or an insulator? (a) an insulator (b) a conductor
  37. 37.🔍 Which is the odd one out? (a) an iron nail (b) a safety pin (c) a steel spoon (d) a plastic ruler
  38. 38.True or false: a woollen thread is an insulator. (a) False (b) True
  39. 39.🔦 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) No (b) Yes
  40. 40.🔌 Why are electric wires covered in plastic? (a) plastic is an insulator (b) to make them heavy (c) plastic makes current (d) plastic is a conductor

Answer key

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

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