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Electronics Worksheet: Conductors and Insulators

Electronics lesson 3: Conductors and insulators · Set 85 · 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 copper wire is an insulator. (a) False (b) True
  2. 2.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
  3. 3.True or false: a rubber eraser is a conductor. (a) True (b) False
  4. 4.True or false: a woollen thread is a conductor. (a) True (b) False
  5. 5.🔍 Which is the odd one out? (a) a metal paper clip (b) an iron nail (c) a ceramic cup (d) a brass key
  6. 6.🔌 A gap of dry air between two wires acts as … (a) a switch that is ON (b) a conductor (c) a cell (d) an insulator
  7. 7.🔍 Which is the odd one out? (a) a dry cork (b) a steel coin (c) a graphite rod (d) a metal paper clip
  8. 8.True or false: an iron nail is an insulator. (a) True (b) False
  9. 9.🔍 Which is the odd one out? (a) a brass key (b) a copper wire (c) a wooden stick (d) a steel coin
  10. 10.True or false: a ceramic cup is an insulator. (a) False (b) True
  11. 11.True or false: a plastic straw is an insulator. (a) True (b) False
  12. 12.True or false: aluminium foil is an insulator. (a) False (b) True
  13. 13.🔌 Is a plastic straw a conductor or an insulator? (a) a conductor (b) an insulator
  14. 14.True or false: a cotton thread is an insulator. (a) False (b) True
  15. 15.Which of these is an insulator? (a) a steel coin (b) a wooden stick (c) a safety pin (d) a steel spoon
  16. 16.🔍 Which is the odd one out? (a) a paper strip (b) a plastic straw (c) a wooden stick (d) aluminium foil
  17. 17.🔌 Is a plastic ruler a conductor or an insulator? (a) an insulator (b) a conductor
  18. 18.Which of these is an insulator? (a) a brass key (b) a steel coin (c) a dry cork (d) aluminium foil
  19. 19.🔍 Which is the odd one out? (a) a steel coin (b) a metal paper clip (c) aluminium foil (d) a rubber band
  20. 20.True or false: a copper wire is a conductor. (a) True (b) False
  21. 21.🔌 Which metal is used for most electric wires at home? (a) plastic (b) rubber (c) glass (d) copper
  22. 22.🔦 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) No (b) Yes
  23. 23.🔌 Is a steel coin a conductor or an insulator? (a) an insulator (b) a conductor
  24. 24.🔍 Which is the odd one out? (a) a paper strip (b) a metal paper clip (c) a steel coin (d) a copper wire
  25. 25.Which of these is an insulator? (a) a brass key (b) a ceramic cup (c) a steel coin (d) a copper wire
  26. 26.Which of these is an insulator? (a) a brass key (b) a metal paper clip (c) a rubber eraser (d) aluminium foil
  27. 27.🔦 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) No (b) Yes
  28. 28.🔌 Is a dry cork a conductor or an insulator? (a) a conductor (b) an insulator
  29. 29.True or false: a metal paper clip is an insulator. (a) True (b) False
  30. 30.Which of these is a conductor? (a) a plastic straw (b) a safety pin (c) a glass marble (d) a dry cork
  31. 31.🔍 Which is the odd one out? (a) a metal paper clip (b) a rubber eraser (c) a steel spoon (d) a copper wire
  32. 32.🔦 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) Yes (b) No
  33. 33.🔦 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
  34. 34.🔌 Is a rubber band a conductor or an insulator? (a) an insulator (b) a conductor
  35. 35.🔦 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) No (b) Yes
  36. 36.True or false: a plastic straw is a conductor. (a) False (b) True
  37. 37.🔦 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) Yes (b) No
  38. 38.True or false: a steel coin is an insulator. (a) False (b) True
  39. 39.🔦 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
  40. 40.🔌 Is a wooden stick a conductor or an insulator? (a) an insulator (b) a conductor

Answer key

  1. False
  2. a conductor
  3. False
  4. False
  5. a ceramic cup
  6. an insulator
  7. a dry cork
  8. False
  9. a wooden stick
  10. True
  11. True
  12. False
  13. an insulator
  14. True
  15. a wooden stick
  16. aluminium foil
  17. an insulator
  18. a dry cork
  19. a rubber band
  20. True
  21. copper
  22. Yes
  23. a conductor
  24. a paper strip
  25. a ceramic cup
  26. a rubber eraser
  27. Yes
  28. an insulator
  29. False
  30. a safety pin
  31. a rubber eraser
  32. Yes
  33. No
  34. an insulator
  35. Yes
  36. False
  37. Yes
  38. False
  39. Yes
  40. an insulator

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