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Electronics Worksheet: Conductors and Insulators

Electronics lesson 3: Conductors and insulators · Set 84 · 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 a conductor. (a) False (b) True
  2. 2.🔌 Is a ceramic cup a conductor or an insulator? (a) an insulator (b) a conductor
  3. 3.Which of these is an insulator? (a) a steel spoon (b) aluminium foil (c) a brass key (d) a plastic straw
  4. 4.🔌 Is a brass key a conductor or an insulator? (a) an insulator (b) a conductor
  5. 5.True or false: an iron nail is a conductor. (a) False (b) True
  6. 6.🔌 Which metal is used for most electric wires at home? (a) rubber (b) glass (c) plastic (d) copper
  7. 7.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
  8. 8.Which of these is a conductor? (a) a plastic ruler (b) a wooden stick (c) a metal paper clip (d) a ceramic cup
  9. 9.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put an iron nail across the gap. Does the bulb glow? (a) Yes (b) No
  10. 10.Which of these is a conductor? (a) a ceramic cup (b) a rubber band (c) a rubber eraser (d) a safety pin
  11. 11.Which of these is an insulator? (a) a woollen thread (b) a steel spoon (c) a brass key (d) an iron nail
  12. 12.🔌 Is a safety pin a conductor or an insulator? (a) an insulator (b) a conductor
  13. 13.🔍 Which is the odd one out? (a) aluminium foil (b) a glass marble (c) a rubber band (d) a plastic ruler
  14. 14.🔌 Is a paper strip a conductor or an insulator? (a) a conductor (b) an insulator
  15. 15.True or false: a steel coin is an insulator. (a) False (b) True
  16. 16.True or false: a brass key is a conductor. (a) True (b) False
  17. 17.True or false: a dry cork is an insulator. (a) False (b) True
  18. 18.True or false: a graphite rod is an insulator. (a) True (b) False
  19. 19.🔍 Which is the odd one out? (a) a brass key (b) a cotton thread (c) a glass marble (d) a woollen thread
  20. 20.🔌 Is a metal paper clip a conductor or an insulator? (a) a conductor (b) an insulator
  21. 21.🔌 Is a steel coin a conductor or an insulator? (a) a conductor (b) an insulator
  22. 22.🔦 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
  23. 23.🔍 Which is the odd one out? (a) an iron nail (b) a cotton thread (c) a steel coin (d) a brass key
  24. 24.🔍 Which is the odd one out? (a) a metal paper clip (b) a plastic straw (c) a plastic ruler (d) a dry cork
  25. 25.True or false: a wooden stick is an insulator. (a) True (b) False
  26. 26.🔦 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
  27. 27.🔍 Which is the odd one out? (a) a glass marble (b) a plastic straw (c) a rubber band (d) a safety pin
  28. 28.True or false: a steel spoon is an insulator. (a) True (b) False
  29. 29.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel spoon across the gap. Does the bulb glow? (a) No (b) Yes
  30. 30.Which of these is a conductor? (a) a steel spoon (b) a wooden stick (c) a rubber band (d) a glass marble
  31. 31.True or false: a plastic ruler is a conductor. (a) False (b) True
  32. 32.🔦 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
  33. 33.Which of these is a conductor? (a) a wooden stick (b) a brass key (c) a ceramic cup (d) a paper strip
  34. 34.True or false: a metal paper clip is an insulator. (a) False (b) True
  35. 35.🔦 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
  36. 36.🔦 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
  37. 37.🔌 A gap of dry air between two wires acts as … (a) a cell (b) an insulator (c) a switch that is ON (d) a conductor
  38. 38.🔍 Which is the odd one out? (a) aluminium foil (b) a steel coin (c) a rubber eraser (d) a graphite rod
  39. 39.🔌 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
  40. 40.🔦 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) Yes (b) No

Answer key

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

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