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Electronics Worksheet: Conductors and Insulators

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

Answer key

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

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