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Electronics Worksheet: Conductors and Insulators

Electronics lesson 3: Conductors and insulators · Set 70 · 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: an iron nail is an insulator. (a) True (b) False
  2. 2.🔍 Which is the odd one out? (a) a plastic straw (b) a wooden stick (c) a glass marble (d) a brass key
  3. 3.🔍 Which is the odd one out? (a) aluminium foil (b) a steel spoon (c) a plastic ruler (d) a graphite rod
  4. 4.True or false: an iron nail is a conductor. (a) True (b) False
  5. 5.🔌 Which part of a screwdriver should an electrician hold? (a) the steel shaft (b) the metal tip (c) the plastic handle (d) the bare end
  6. 6.🔌 Is a steel spoon a conductor or an insulator? (a) an insulator (b) a conductor
  7. 7.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) an insulator (c) a switch that is ON (d) a cell
  8. 8.🔌 Most metals are good … (a) conductors (b) batteries (c) insulators (d) magnets only
  9. 9.🔦 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) Yes (b) No
  10. 10.Which of these is a conductor? (a) a steel coin (b) a cotton thread (c) a woollen thread (d) a plastic straw
  11. 11.🔌 Is a plastic straw a conductor or an insulator? (a) an insulator (b) a conductor
  12. 12.🔌 Which metal is used for most electric wires at home? (a) glass (b) copper (c) plastic (d) rubber
  13. 13.🔌 Is a brass key a conductor or an insulator? (a) an insulator (b) a conductor
  14. 14.🔍 Which is the odd one out? (a) a plastic straw (b) aluminium foil (c) a ceramic cup (d) a plastic ruler
  15. 15.Which of these is a conductor? (a) a glass marble (b) a graphite rod (c) a rubber band (d) a plastic ruler
  16. 16.🔌 Is a ceramic cup a conductor or an insulator? (a) a conductor (b) an insulator
  17. 17.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) plastic is a conductor (c) plastic is an insulator (d) to make them heavy
  18. 18.🔌 Is a woollen thread a conductor or an insulator? (a) an insulator (b) a conductor
  19. 19.🔌 Is a rubber band a conductor or an insulator? (a) a conductor (b) an insulator
  20. 20.🔌 Is a paper strip a conductor or an insulator? (a) a conductor (b) an insulator
  21. 21.True or false: a cotton thread is an insulator. (a) False (b) True
  22. 22.Which of these is an insulator? (a) a steel spoon (b) a brass key (c) a copper wire (d) a woollen thread
  23. 23.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
  24. 24.🔦 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
  25. 25.🔍 Which is the odd one out? (a) a steel spoon (b) a copper wire (c) a paper strip (d) a steel coin
  26. 26.🔌 Is a rubber eraser a conductor or an insulator? (a) an insulator (b) a conductor
  27. 27.Which of these is a conductor? (a) a rubber eraser (b) a paper strip (c) a safety pin (d) a woollen thread
  28. 28.True or false: a paper strip is a conductor. (a) False (b) True
  29. 29.🔦 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) No (b) Yes
  30. 30.🔍 Which is the odd one out? (a) a glass marble (b) a copper wire (c) a plastic ruler (d) a paper strip
  31. 31.🔦 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) No (b) Yes
  32. 32.True or false: a dry cork is a conductor. (a) True (b) False
  33. 33.🔍 Which is the odd one out? (a) a cotton thread (b) a plastic straw (c) a metal paper clip (d) a dry cork
  34. 34.Which of these is a conductor? (a) a glass marble (b) a cotton thread (c) a steel spoon (d) a woollen thread
  35. 35.🔦 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) No (b) Yes
  36. 36.🔍 Which is the odd one out? (a) an iron nail (b) a steel coin (c) a plastic straw (d) aluminium foil
  37. 37.🔦 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
  38. 38.Which of these is an insulator? (a) aluminium foil (b) a copper wire (c) a cotton thread (d) a steel spoon
  39. 39.Which of these is an insulator? (a) a steel spoon (b) a steel coin (c) a dry cork (d) a copper wire
  40. 40.Which of these is an insulator? (a) a metal paper clip (b) a wooden stick (c) a brass key (d) a steel coin

Answer key

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

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