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Electronics Worksheet: Conductors and Insulators

Electronics lesson 3: Conductors and insulators · Set 104 · 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 brass key is an insulator. (a) True (b) False
  2. 2.🔍 Which is the odd one out? (a) a steel coin (b) a safety pin (c) a woollen thread (d) a copper wire
  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) No (b) Yes
  4. 4.Which of these is a conductor? (a) a wooden stick (b) a plastic ruler (c) a graphite rod (d) a ceramic cup
  5. 5.🔌 Which part of a screwdriver should an electrician hold? (a) the metal tip (b) the steel shaft (c) the plastic handle (d) the bare end
  6. 6.🔌 Is a rubber band a conductor or an insulator? (a) an insulator (b) a conductor
  7. 7.🔍 Which is the odd one out? (a) a rubber eraser (b) a dry cork (c) a paper strip (d) a graphite rod
  8. 8.Which of these is a conductor? (a) a glass marble (b) a rubber eraser (c) a metal paper clip (d) a dry cork
  9. 9.🔍 Which is the odd one out? (a) aluminium foil (b) a metal paper clip (c) an iron nail (d) a rubber band
  10. 10.🔍 Which is the odd one out? (a) a plastic ruler (b) a copper wire (c) a safety pin (d) a brass key
  11. 11.🔍 Which is the odd one out? (a) a steel spoon (b) a brass key (c) a steel coin (d) a wooden stick
  12. 12.True or false: a plastic straw is a conductor. (a) True (b) False
  13. 13.🔦 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
  14. 14.Which of these is a conductor? (a) a dry cork (b) a paper strip (c) a wooden stick (d) an iron nail
  15. 15.🔌 Is a safety pin a conductor or an insulator? (a) a conductor (b) an insulator
  16. 16.🔍 Which is the odd one out? (a) a rubber band (b) a plastic straw (c) a woollen thread (d) a steel spoon
  17. 17.True or false: a paper strip is a conductor. (a) True (b) False
  18. 18.True or false: a graphite rod is an insulator. (a) False (b) True
  19. 19.🔦 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
  20. 20.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
  21. 21.🔦 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
  22. 22.🔦 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
  23. 23.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic is an insulator (c) plastic is a conductor (d) plastic makes current
  24. 24.🔌 Is a rubber eraser a conductor or an insulator? (a) a conductor (b) an insulator
  25. 25.True or false: a dry cork is a conductor. (a) False (b) True
  26. 26.True or false: a plastic straw is an insulator. (a) True (b) False
  27. 27.True or false: a steel coin is a conductor. (a) True (b) False
  28. 28.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a graphite rod across the gap. Does the bulb glow? (a) No (b) Yes
  29. 29.🔌 Is a steel spoon a conductor or an insulator? (a) an insulator (b) a conductor
  30. 30.True or false: a woollen thread is an insulator. (a) False (b) True
  31. 31.🔌 Is a ceramic cup a conductor or an insulator? (a) an insulator (b) a conductor
  32. 32.🔌 Is a plastic ruler a conductor or an insulator? (a) an insulator (b) a conductor
  33. 33.🔌 Is a metal paper clip a conductor or an insulator? (a) a conductor (b) an insulator
  34. 34.🔌 Which metal is used for most electric wires at home? (a) copper (b) glass (c) plastic (d) rubber
  35. 35.🔌 Is a dry cork a conductor or an insulator? (a) an insulator (b) a conductor
  36. 36.🔍 Which is the odd one out? (a) a cotton thread (b) a glass marble (c) a rubber band (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 paper strip across the gap. Does the bulb glow? (a) Yes (b) No
  38. 38.🔦 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) No (b) Yes
  39. 39.🔌 Most metals are good … (a) insulators (b) magnets only (c) batteries (d) conductors
  40. 40.🔦 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

Answer key

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

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