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Electronics Worksheet: Conductors and Insulators

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

Answer key

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

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