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Electronics Worksheet: Conductors and Insulators

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

Answer key

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

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