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Electronics Worksheet: Conductors and Insulators

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

Answer key

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

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