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Electronics Worksheet: Conductors and Insulators

Electronics lesson 3: Conductors and insulators · Set 60 · 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.🔦 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) Yes (b) No
  2. 2.🔌 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
  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.🔌 Is a plastic straw a conductor or an insulator? (a) an insulator (b) a conductor
  5. 5.🔍 Which is the odd one out? (a) a cotton thread (b) aluminium foil (c) a metal paper clip (d) a graphite rod
  6. 6.🔍 Which is the odd one out? (a) a ceramic cup (b) a brass key (c) a glass marble (d) a rubber band
  7. 7.True or false: a rubber eraser is a conductor. (a) True (b) False
  8. 8.🔌 Is aluminium foil a conductor or an insulator? (a) a conductor (b) an insulator
  9. 9.True or false: a rubber band is an insulator. (a) True (b) False
  10. 10.🔌 A gap of dry air between two wires acts as … (a) a switch that is ON (b) a conductor (c) an insulator (d) a cell
  11. 11.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
  12. 12.🔍 Which is the odd one out? (a) a wooden stick (b) a dry cork (c) a rubber eraser (d) an iron nail
  13. 13.🔦 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
  14. 14.🔌 Is a cotton thread a conductor or an insulator? (a) a conductor (b) an insulator
  15. 15.🔍 Which is the odd one out? (a) a safety pin (b) a wooden stick (c) a steel coin (d) an iron nail
  16. 16.Which of these is an insulator? (a) a metal paper clip (b) a steel coin (c) aluminium foil (d) a rubber eraser
  17. 17.🔌 Most metals are good … (a) insulators (b) conductors (c) magnets only (d) batteries
  18. 18.True or false: aluminium foil is a conductor. (a) True (b) False
  19. 19.Which of these is a conductor? (a) a plastic ruler (b) a copper wire (c) a rubber band (d) a glass marble
  20. 20.True or false: an iron nail is a conductor. (a) True (b) False
  21. 21.True or false: a safety pin is a conductor. (a) True (b) False
  22. 22.🔦 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
  23. 23.🔍 Which is the odd one out? (a) a plastic ruler (b) a steel spoon (c) a paper strip (d) a wooden stick
  24. 24.Which of these is a conductor? (a) a woollen thread (b) a glass marble (c) a graphite rod (d) a dry cork
  25. 25.True or false: aluminium foil is an insulator. (a) False (b) True
  26. 26.🔦 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
  27. 27.🔍 Which is the odd one out? (a) a brass key (b) a copper wire (c) a paper strip (d) a steel coin
  28. 28.True or false: a steel spoon is a conductor. (a) False (b) True
  29. 29.Which of these is an insulator? (a) a steel coin (b) a graphite rod (c) a plastic ruler (d) aluminium foil
  30. 30.🔍 Which is the odd one out? (a) a copper wire (b) a rubber eraser (c) a woollen thread (d) a plastic straw
  31. 31.True or false: a copper wire is an insulator. (a) False (b) True
  32. 32.True or false: a safety pin is an insulator. (a) False (b) True
  33. 33.🔍 Which is the odd one out? (a) a woollen thread (b) a ceramic cup (c) a paper strip (d) a steel coin
  34. 34.🔌 Is a brass key a conductor or an insulator? (a) a conductor (b) an insulator
  35. 35.🔦 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) Yes (b) No
  36. 36.🔍 Which is the odd one out? (a) a graphite rod (b) a woollen thread (c) a safety pin (d) a brass key
  37. 37.True or false: a rubber eraser is an insulator. (a) True (b) False
  38. 38.🔦 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) No (b) Yes
  39. 39.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) to make them heavy (c) plastic is an insulator (d) plastic is a conductor
  40. 40.🔌 Is a safety pin a conductor or an insulator? (a) an insulator (b) a conductor

Answer key

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

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