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Electronics Worksheet: Conductors and Insulators

Electronics lesson 3: Conductors and insulators · Set 88 · 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 band is a conductor. (a) True (b) False
  2. 2.🔍 Which is the odd one out? (a) a steel coin (b) a plastic ruler (c) a woollen thread (d) a plastic straw
  3. 3.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
  4. 4.🔌 Is a plastic straw a conductor or an insulator? (a) a conductor (b) an insulator
  5. 5.🔍 Which is the odd one out? (a) a copper wire (b) a cotton thread (c) aluminium foil (d) a metal paper clip
  6. 6.Which of these is a conductor? (a) a plastic straw (b) a ceramic cup (c) a copper wire (d) a plastic ruler
  7. 7.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) plastic is an insulator (c) to make them heavy (d) plastic makes current
  8. 8.Which of these is a conductor? (a) a paper strip (b) a plastic ruler (c) a ceramic cup (d) a brass key
  9. 9.True or false: a woollen thread is an insulator. (a) False (b) True
  10. 10.Which of these is an insulator? (a) a steel coin (b) a dry cork (c) a metal paper clip (d) a graphite rod
  11. 11.🔦 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
  12. 12.🔌 Most metals are good … (a) conductors (b) magnets only (c) insulators (d) batteries
  13. 13.🔌 Which part of a screwdriver should an electrician hold? (a) the metal tip (b) the steel shaft (c) the plastic handle (d) the bare end
  14. 14.🔌 A gap of dry air between two wires acts as … (a) a switch that is ON (b) a cell (c) an insulator (d) a conductor
  15. 15.True or false: a glass marble is an insulator. (a) True (b) False
  16. 16.🔌 Is a dry cork a conductor or an insulator? (a) an insulator (b) a conductor
  17. 17.Which of these is a conductor? (a) a cotton thread (b) a ceramic cup (c) an iron nail (d) a plastic straw
  18. 18.True or false: a wooden stick is an insulator. (a) False (b) True
  19. 19.🔍 Which is the odd one out? (a) a steel spoon (b) a rubber band (c) a brass key (d) a metal paper clip
  20. 20.🔌 Is a cotton thread a conductor or an insulator? (a) a conductor (b) an insulator
  21. 21.Which of these is an insulator? (a) an iron nail (b) a cotton thread (c) a steel spoon (d) a copper wire
  22. 22.True or false: a copper wire is an insulator. (a) False (b) True
  23. 23.🔌 Which metal is used for most electric wires at home? (a) plastic (b) glass (c) rubber (d) copper
  24. 24.🔦 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
  25. 25.🔌 Is a rubber eraser a conductor or an insulator? (a) a conductor (b) an insulator
  26. 26.🔌 Is a wooden stick a conductor or an insulator? (a) a conductor (b) an insulator
  27. 27.True or false: a metal paper clip is an insulator. (a) False (b) True
  28. 28.🔍 Which is the odd one out? (a) a graphite rod (b) an iron nail (c) a copper wire (d) a ceramic cup
  29. 29.🔌 Is a safety pin a conductor or an insulator? (a) an insulator (b) a conductor
  30. 30.🔍 Which is the odd one out? (a) a plastic straw (b) a wooden stick (c) a glass marble (d) an iron nail
  31. 31.Which of these is an insulator? (a) a graphite rod (b) a steel spoon (c) a copper wire (d) a paper strip
  32. 32.Which of these is a conductor? (a) a steel spoon (b) a plastic ruler (c) a woollen thread (d) a paper strip
  33. 33.True or false: a safety pin is an insulator. (a) True (b) False
  34. 34.🔦 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
  35. 35.True or false: a dry cork is an insulator. (a) False (b) True
  36. 36.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
  37. 37.🔌 Is a steel spoon a conductor or an insulator? (a) an insulator (b) a conductor
  38. 38.True or false: a rubber band is an insulator. (a) False (b) True
  39. 39.Which of these is an insulator? (a) a woollen thread (b) aluminium foil (c) a brass key (d) a safety pin
  40. 40.Which of these is a conductor? (a) a cotton thread (b) a ceramic cup (c) a plastic ruler (d) a safety pin

Answer key

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

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