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Electronics Worksheet: Conductors and Insulators

Electronics lesson 3: Conductors and insulators · Set 68 · 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.🔌 Most metals are good … (a) insulators (b) conductors (c) batteries (d) magnets only
  2. 2.🔦 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) No (b) Yes
  3. 3.Which of these is an insulator? (a) aluminium foil (b) a steel coin (c) a paper strip (d) a metal paper clip
  4. 4.🔌 Is a cotton thread a conductor or an insulator? (a) an insulator (b) a conductor
  5. 5.🔌 Is a paper strip a conductor or an insulator? (a) an insulator (b) a conductor
  6. 6.🔌 Is a ceramic cup a conductor or an insulator? (a) a conductor (b) an insulator
  7. 7.🔍 Which is the odd one out? (a) a glass marble (b) a safety pin (c) a copper wire (d) a graphite rod
  8. 8.Which of these is a conductor? (a) a glass marble (b) a paper strip (c) a metal paper clip (d) a plastic straw
  9. 9.🔦 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) Yes (b) No
  10. 10.🔌 Is a graphite rod a conductor or an insulator? (a) an insulator (b) a conductor
  11. 11.🔌 Is a metal paper clip a conductor or an insulator? (a) a conductor (b) an insulator
  12. 12.Which of these is a conductor? (a) a glass marble (b) a wooden stick (c) a plastic straw (d) a copper wire
  13. 13.Which of these is a conductor? (a) a dry cork (b) a cotton thread (c) a steel coin (d) a ceramic cup
  14. 14.Which of these is an insulator? (a) a safety pin (b) a cotton thread (c) an iron nail (d) aluminium foil
  15. 15.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
  16. 16.🔌 Is a woollen thread a conductor or an insulator? (a) an insulator (b) a conductor
  17. 17.🔦 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
  18. 18.True or false: a woollen thread is an insulator. (a) False (b) True
  19. 19.Which of these is a conductor? (a) aluminium foil (b) a paper strip (c) a rubber eraser (d) a cotton thread
  20. 20.🔍 Which is the odd one out? (a) a wooden stick (b) a steel spoon (c) a steel coin (d) a copper wire
  21. 21.🔍 Which is the odd one out? (a) a steel spoon (b) a rubber band (c) a steel coin (d) a copper wire
  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) No (b) Yes
  23. 23.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) to make them heavy (c) plastic makes current (d) plastic is an insulator
  24. 24.True or false: a metal paper clip is an insulator. (a) False (b) True
  25. 25.Which of these is an insulator? (a) a metal paper clip (b) a plastic ruler (c) a copper wire (d) aluminium foil
  26. 26.True or false: aluminium foil is an insulator. (a) False (b) True
  27. 27.🔍 Which is the odd one out? (a) a wooden stick (b) a steel coin (c) a plastic straw (d) a cotton thread
  28. 28.Which of these is an insulator? (a) a brass key (b) a safety pin (c) a metal paper clip (d) a glass marble
  29. 29.🔍 Which is the odd one out? (a) a brass key (b) a rubber eraser (c) a dry cork (d) a cotton thread
  30. 30.🔌 Is a plastic straw a conductor or an insulator? (a) a conductor (b) an insulator
  31. 31.True or false: a copper wire is an insulator. (a) True (b) False
  32. 32.True or false: a woollen thread is a conductor. (a) True (b) False
  33. 33.🔦 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
  34. 34.🔍 Which is the odd one out? (a) a graphite rod (b) a rubber band (c) a cotton thread (d) a wooden stick
  35. 35.🔦 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) Yes (b) No
  36. 36.🔍 Which is the odd one out? (a) a cotton thread (b) a plastic straw (c) a copper wire (d) a rubber eraser
  37. 37.🔌 Which metal is used for most electric wires at home? (a) plastic (b) copper (c) rubber (d) glass
  38. 38.True or false: a cotton thread is a conductor. (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 a glass marble across the gap. Does the bulb glow? (a) Yes (b) No
  40. 40.🔦 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

Answer key

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

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