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Electronics Worksheet: Conductors and Insulators

Electronics lesson 3: Conductors and insulators · Set 54 · 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 brass key a conductor or an insulator? (a) an insulator (b) a conductor
  2. 2.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
  3. 3.🔦 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
  4. 4.🔌 Which part of a screwdriver should an electrician hold? (a) the plastic handle (b) the metal tip (c) the steel shaft (d) the bare end
  5. 5.🔦 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) No (b) Yes
  6. 6.🔍 Which is the odd one out? (a) a metal paper clip (b) a steel spoon (c) a glass marble (d) a brass key
  7. 7.🔌 Is a glass marble a conductor or an insulator? (a) a conductor (b) an insulator
  8. 8.True or false: a paper strip is an insulator. (a) False (b) True
  9. 9.Which of these is a conductor? (a) a glass marble (b) a rubber band (c) a cotton thread (d) a graphite rod
  10. 10.🔦 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) Yes (b) No
  11. 11.🔦 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
  12. 12.🔌 A gap of dry air between two wires acts as … (a) a cell (b) a switch that is ON (c) an insulator (d) a conductor
  13. 13.🔍 Which is the odd one out? (a) a metal paper clip (b) a plastic straw (c) a copper wire (d) a steel coin
  14. 14.True or false: a woollen thread is a conductor. (a) True (b) False
  15. 15.True or false: a dry cork is a conductor. (a) True (b) False
  16. 16.Which of these is a conductor? (a) a wooden stick (b) a rubber eraser (c) a rubber band (d) a steel coin
  17. 17.True or false: a brass key is a conductor. (a) True (b) False
  18. 18.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) plastic is an insulator (c) to make them heavy (d) plastic is a conductor
  19. 19.Which of these is an insulator? (a) a copper wire (b) a safety pin (c) a steel spoon (d) a rubber band
  20. 20.🔌 Is a plastic ruler a conductor or an insulator? (a) a conductor (b) an insulator
  21. 21.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
  22. 22.🔍 Which is the odd one out? (a) a cotton thread (b) a safety pin (c) a dry cork (d) a woollen thread
  23. 23.Which of these is a conductor? (a) a plastic ruler (b) a woollen thread (c) a cotton thread (d) a brass key
  24. 24.🔦 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) Yes (b) No
  25. 25.Which of these is a conductor? (a) a dry cork (b) a wooden stick (c) a steel spoon (d) a cotton thread
  26. 26.True or false: a safety pin is an insulator. (a) False (b) True
  27. 27.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) Yes (b) No
  28. 28.True or false: a plastic ruler is an insulator. (a) False (b) True
  29. 29.True or false: a rubber eraser is an insulator. (a) False (b) True
  30. 30.🔍 Which is the odd one out? (a) a dry cork (b) a rubber band (c) a graphite rod (d) a ceramic cup
  31. 31.🔌 Is a steel coin a conductor or an insulator? (a) a conductor (b) an insulator
  32. 32.True or false: an iron nail is an insulator. (a) False (b) True
  33. 33.True or false: a glass marble is a conductor. (a) True (b) False
  34. 34.🔌 Which metal is used for most electric wires at home? (a) copper (b) rubber (c) glass (d) plastic
  35. 35.True or false: a rubber band is a conductor. (a) True (b) False
  36. 36.🔍 Which is the odd one out? (a) a steel spoon (b) a cotton thread (c) a graphite rod (d) a metal paper clip
  37. 37.🔦 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
  38. 38.True or false: a rubber eraser is a conductor. (a) True (b) False
  39. 39.True or false: a dry cork is an insulator. (a) False (b) True
  40. 40.🔦 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

Answer key

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

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