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Electronics Worksheet: Conductors and Insulators

Electronics lesson 3: Conductors and insulators · Set 87 · 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 steel spoon (b) a copper wire (c) a plastic ruler (d) a safety pin
  2. 2.🔦 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
  3. 3.Which of these is an insulator? (a) a metal paper clip (b) a brass key (c) a dry cork (d) a copper wire
  4. 4.🔌 Is a copper wire a conductor or an insulator? (a) a conductor (b) an insulator
  5. 5.Which of these is a conductor? (a) a rubber band (b) a paper strip (c) a plastic ruler (d) a metal paper clip
  6. 6.🔍 Which is the odd one out? (a) a dry cork (b) a steel spoon (c) a cotton thread (d) a plastic straw
  7. 7.🔍 Which is the odd one out? (a) aluminium foil (b) a ceramic cup (c) a plastic ruler (d) a plastic straw
  8. 8.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic is an insulator (c) plastic makes current (d) plastic is a conductor
  9. 9.True or false: aluminium foil is a conductor. (a) True (b) False
  10. 10.🔍 Which is the odd one out? (a) an iron nail (b) a brass key (c) a wooden stick (d) a copper wire
  11. 11.🔦 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) No (b) Yes
  12. 12.🔍 Which is the odd one out? (a) a graphite rod (b) a paper strip (c) a wooden stick (d) a cotton thread
  13. 13.🔌 Most metals are good … (a) magnets only (b) insulators (c) conductors (d) batteries
  14. 14.Which of these is a conductor? (a) aluminium foil (b) a rubber band (c) a dry cork (d) a woollen thread
  15. 15.🔍 Which is the odd one out? (a) a cotton thread (b) a steel spoon (c) a safety pin (d) a metal paper clip
  16. 16.Which of these is an insulator? (a) a graphite rod (b) an iron nail (c) a rubber band (d) a steel spoon
  17. 17.🔌 Is a wooden stick a conductor or an insulator? (a) a conductor (b) an insulator
  18. 18.🔌 Is a safety pin a conductor or an insulator? (a) a conductor (b) an insulator
  19. 19.🔌 Which part of a screwdriver should an electrician hold? (a) the steel shaft (b) the metal tip (c) the bare end (d) the plastic handle
  20. 20.🔌 Is a plastic straw a conductor or an insulator? (a) a conductor (b) an insulator
  21. 21.True or false: a copper wire is a conductor. (a) True (b) False
  22. 22.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
  23. 23.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) a cell (c) an insulator (d) a switch that is ON
  24. 24.🔦 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
  25. 25.Which of these is a conductor? (a) a plastic ruler (b) a graphite rod (c) a wooden stick (d) a glass marble
  26. 26.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
  27. 27.🔌 Is a rubber eraser a conductor or an insulator? (a) a conductor (b) an insulator
  28. 28.🔦 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) No (b) Yes
  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 metal is used for most electric wires at home? (a) glass (b) plastic (c) rubber (d) copper
  31. 31.🔌 Is a ceramic cup a conductor or an insulator? (a) an insulator (b) a conductor
  32. 32.🔌 Is a graphite rod a conductor or an insulator? (a) a conductor (b) an insulator
  33. 33.Which of these is a conductor? (a) a glass marble (b) a wooden stick (c) a steel spoon (d) a plastic ruler
  34. 34.True or false: a dry cork is an insulator. (a) False (b) True
  35. 35.Which of these is a conductor? (a) an iron nail (b) a wooden stick (c) a plastic straw (d) a plastic ruler
  36. 36.🔦 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
  37. 37.Which of these is an insulator? (a) a steel spoon (b) aluminium foil (c) a wooden stick (d) a safety pin
  38. 38.Which of these is an insulator? (a) a steel spoon (b) a plastic straw (c) a brass key (d) a copper wire
  39. 39.🔌 Is a woollen thread a conductor or an insulator? (a) a conductor (b) an insulator
  40. 40.🔍 Which is the odd one out? (a) a glass marble (b) a paper strip (c) a brass key (d) a rubber eraser

Answer key

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

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