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Electronics Worksheet: Conductors and Insulators

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

Answer key

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

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