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Electronics Worksheet: Conductors and Insulators

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

Answer key

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

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