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Electronics Worksheet: Conductors and Insulators

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

Answer key

  1. a plastic straw
  2. a conductor
  3. No
  4. a graphite rod
  5. an insulator
  6. conductors
  7. a copper wire
  8. True
  9. No
  10. No
  11. a ceramic cup
  12. True
  13. copper
  14. an insulator
  15. an insulator
  16. a plastic ruler
  17. a metal paper clip
  18. a glass marble
  19. a plastic straw
  20. an insulator
  21. the plastic handle
  22. True
  23. a plastic ruler
  24. an iron nail
  25. False
  26. Yes
  27. True
  28. a rubber band
  29. False
  30. plastic is an insulator
  31. a wooden stick
  32. an insulator
  33. an insulator
  34. a cotton thread
  35. Yes
  36. No
  37. No
  38. Yes
  39. an insulator
  40. a safety pin

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