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Electronics Worksheet: Conductors and Insulators

Electronics lesson 3: Conductors and insulators · Set 78 · 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 graphite rod (b) a steel spoon (c) a rubber band (d) a metal paper clip
  2. 2.🔍 Which is the odd one out? (a) an iron nail (b) a safety pin (c) a copper wire (d) a rubber band
  3. 3.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic ruler across the gap. Does the bulb glow? (a) Yes (b) No
  4. 4.🔍 Which is the odd one out? (a) a wooden stick (b) a steel spoon (c) a safety pin (d) a metal paper clip
  5. 5.🔌 Why are electric wires covered in plastic? (a) plastic is an insulator (b) plastic makes current (c) plastic is a conductor (d) to make them heavy
  6. 6.🔍 Which is the odd one out? (a) a paper strip (b) an iron nail (c) a ceramic cup (d) a glass marble
  7. 7.🔍 Which is the odd one out? (a) a graphite rod (b) a brass key (c) a metal paper clip (d) a ceramic cup
  8. 8.🔌 Is a rubber eraser a conductor or an insulator? (a) a conductor (b) an insulator
  9. 9.Which of these is an insulator? (a) a metal paper clip (b) a brass key (c) a safety pin (d) a plastic straw
  10. 10.🔍 Which is the odd one out? (a) a safety pin (b) a steel spoon (c) a brass key (d) a glass marble
  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.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
  13. 13.Which of these is an insulator? (a) an iron nail (b) a copper wire (c) a paper strip (d) aluminium foil
  14. 14.🔌 Is a graphite rod a conductor or an insulator? (a) an insulator (b) a conductor
  15. 15.🔌 Which metal is used for most electric wires at home? (a) plastic (b) glass (c) copper (d) rubber
  16. 16.🔍 Which is the odd one out? (a) a rubber eraser (b) a glass marble (c) a plastic ruler (d) a brass key
  17. 17.🔦 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
  18. 18.Which of these is a conductor? (a) a wooden stick (b) aluminium foil (c) a cotton thread (d) a paper strip
  19. 19.Which of these is an insulator? (a) a steel spoon (b) a steel coin (c) a rubber eraser (d) an iron nail
  20. 20.🔦 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
  21. 21.🔍 Which is the odd one out? (a) aluminium foil (b) a copper wire (c) a cotton thread (d) a metal paper clip
  22. 22.Which of these is a conductor? (a) a glass marble (b) a rubber band (c) a rubber eraser (d) a steel coin
  23. 23.True or false: a steel coin is a conductor. (a) True (b) False
  24. 24.🔌 Is a cotton thread a conductor or an insulator? (a) a conductor (b) an insulator
  25. 25.True or false: a rubber eraser is an insulator. (a) True (b) False
  26. 26.🔌 Is a wooden stick a conductor or an insulator? (a) a conductor (b) an insulator
  27. 27.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) an insulator (c) a switch that is ON (d) a cell
  28. 28.🔌 Is a paper strip a conductor or an insulator? (a) an insulator (b) a conductor
  29. 29.🔦 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
  30. 30.🔌 Most metals are good … (a) insulators (b) magnets only (c) batteries (d) conductors
  31. 31.🔌 Is a woollen thread a conductor or an insulator? (a) an insulator (b) a conductor
  32. 32.Which of these is an insulator? (a) a brass key (b) aluminium foil (c) a dry cork (d) a steel coin
  33. 33.🔌 Is a plastic ruler a conductor or an insulator? (a) an insulator (b) a conductor
  34. 34.🔍 Which is the odd one out? (a) a glass marble (b) a safety pin (c) a wooden stick (d) a rubber band
  35. 35.🔦 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
  36. 36.Which of these is a conductor? (a) a cotton thread (b) a ceramic cup (c) a wooden stick (d) a steel spoon
  37. 37.🔦 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
  38. 38.🔌 Is a steel coin a conductor or an insulator? (a) a conductor (b) an insulator
  39. 39.True or false: a safety pin is a conductor. (a) False (b) True
  40. 40.🔌 Which part of a screwdriver should an electrician hold? (a) the bare end (b) the steel shaft (c) the metal tip (d) the plastic handle

Answer key

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

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