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Electronics Worksheet: Conductors and Insulators

Electronics lesson 3: Conductors and insulators · Set 50 · 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 part of a screwdriver should an electrician hold? (a) the steel shaft (b) the metal tip (c) the bare end (d) the plastic handle
  2. 2.Which of these is an insulator? (a) a steel coin (b) aluminium foil (c) a rubber eraser (d) a copper wire
  3. 3.🔌 Which metal is used for most electric wires at home? (a) glass (b) copper (c) rubber (d) plastic
  4. 4.Which of these is an insulator? (a) a plastic straw (b) a copper wire (c) a steel spoon (d) an iron nail
  5. 5.Which of these is an insulator? (a) a copper wire (b) a metal paper clip (c) a glass marble (d) a graphite rod
  6. 6.🔌 Is a steel spoon a conductor or an insulator? (a) an insulator (b) a conductor
  7. 7.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
  8. 8.🔌 Is a cotton thread a conductor or an insulator? (a) an insulator (b) a conductor
  9. 9.True or false: a dry cork is an insulator. (a) False (b) True
  10. 10.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) an insulator (c) a switch that is ON (d) a cell
  11. 11.🔌 Is a paper strip a conductor or an insulator? (a) a conductor (b) an insulator
  12. 12.🔌 Most metals are good … (a) magnets only (b) conductors (c) insulators (d) batteries
  13. 13.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber band across the gap. Does the bulb glow? (a) No (b) Yes
  14. 14.🔍 Which is the odd one out? (a) a copper wire (b) a woollen thread (c) a safety pin (d) a brass key
  15. 15.True or false: a steel spoon is a conductor. (a) True (b) False
  16. 16.🔌 Is a rubber eraser a conductor or an insulator? (a) an insulator (b) a conductor
  17. 17.🔍 Which is the odd one out? (a) a copper wire (b) a wooden stick (c) a graphite rod (d) an iron nail
  18. 18.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a wooden stick across the gap. Does the bulb glow? (a) Yes (b) No
  19. 19.Which of these is an insulator? (a) an iron nail (b) a steel spoon (c) a rubber band (d) a steel coin
  20. 20.True or false: a copper wire is an insulator. (a) False (b) True
  21. 21.🔌 Is a plastic ruler a conductor or an insulator? (a) a conductor (b) an insulator
  22. 22.Which of these is a conductor? (a) a graphite rod (b) a cotton thread (c) a wooden stick (d) a rubber band
  23. 23.🔦 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
  24. 24.🔍 Which is the odd one out? (a) a metal paper clip (b) a paper strip (c) a ceramic cup (d) a wooden stick
  25. 25.True or false: a plastic ruler is an insulator. (a) True (b) False
  26. 26.🔌 Is a steel coin a conductor or an insulator? (a) an insulator (b) a conductor
  27. 27.🔍 Which is the odd one out? (a) a copper wire (b) a ceramic cup (c) a woollen thread (d) a rubber band
  28. 28.🔦 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
  29. 29.🔍 Which is the odd one out? (a) a paper strip (b) a brass key (c) a metal paper clip (d) aluminium foil
  30. 30.🔦 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
  31. 31.🔌 Why are electric wires covered in plastic? (a) plastic is an insulator (b) plastic makes current (c) to make them heavy (d) plastic is a conductor
  32. 32.🔌 Is a graphite rod a conductor or an insulator? (a) an insulator (b) a conductor
  33. 33.🔍 Which is the odd one out? (a) a copper wire (b) a steel spoon (c) a plastic ruler (d) an iron nail
  34. 34.Which of these is a conductor? (a) a safety pin (b) a plastic straw (c) a wooden stick (d) a glass marble
  35. 35.🔦 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
  36. 36.Which of these is an insulator? (a) an iron nail (b) a paper strip (c) a steel coin (d) aluminium foil
  37. 37.True or false: a graphite rod is an insulator. (a) True (b) False
  38. 38.True or false: a cotton thread is an insulator. (a) True (b) False
  39. 39.🔍 Which is the odd one out? (a) a wooden stick (b) a plastic straw (c) a brass key (d) a paper strip
  40. 40.Which of these is a conductor? (a) a plastic ruler (b) a ceramic cup (c) a rubber eraser (d) an iron nail

Answer key

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

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