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Electronics Worksheet: Conductors and Insulators

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

Answer key

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

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