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Electronics Worksheet: Conductors and Insulators

Electronics lesson 3: Conductors and insulators · Set 71 · 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) aluminium foil (c) a safety pin (d) a ceramic cup
  2. 2.🔌 A gap of dry air between two wires acts as … (a) a switch that is ON (b) an insulator (c) a conductor (d) a cell
  3. 3.True or false: a rubber band is an insulator. (a) False (b) True
  4. 4.Which of these is a conductor? (a) a brass key (b) a rubber eraser (c) a cotton thread (d) a woollen thread
  5. 5.🔌 Which metal is used for most electric wires at home? (a) glass (b) copper (c) rubber (d) plastic
  6. 6.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
  7. 7.Which of these is an insulator? (a) a graphite rod (b) a brass key (c) a rubber eraser (d) a steel coin
  8. 8.True or false: a steel spoon is an insulator. (a) True (b) False
  9. 9.🔦 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
  10. 10.🔌 Is a wooden stick a conductor or an insulator? (a) an insulator (b) a conductor
  11. 11.Which of these is an insulator? (a) a copper wire (b) a safety pin (c) a brass key (d) a wooden stick
  12. 12.🔌 Is a rubber band a conductor or an insulator? (a) a conductor (b) an insulator
  13. 13.True or false: a ceramic cup is an insulator. (a) True (b) False
  14. 14.🔌 Is a paper strip a conductor or an insulator? (a) a conductor (b) an insulator
  15. 15.True or false: a graphite rod is an insulator. (a) False (b) True
  16. 16.True or false: a safety pin is an insulator. (a) True (b) False
  17. 17.True or false: a dry cork is a conductor. (a) False (b) True
  18. 18.🔍 Which is the odd one out? (a) a wooden stick (b) a woollen thread (c) aluminium foil (d) a rubber eraser
  19. 19.True or false: a brass key is a conductor. (a) False (b) True
  20. 20.🔌 Is a dry cork a conductor or an insulator? (a) a conductor (b) an insulator
  21. 21.🔦 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
  22. 22.Which of these is a conductor? (a) a steel spoon (b) a rubber band (c) a plastic ruler (d) a plastic straw
  23. 23.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
  24. 24.🔍 Which is the odd one out? (a) a rubber eraser (b) aluminium foil (c) a safety pin (d) a steel coin
  25. 25.🔌 Most metals are good … (a) insulators (b) batteries (c) conductors (d) magnets only
  26. 26.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
  27. 27.True or false: a plastic straw is an insulator. (a) True (b) False
  28. 28.Which of these is a conductor? (a) a wooden stick (b) a dry cork (c) an iron nail (d) a paper strip
  29. 29.🔍 Which is the odd one out? (a) a dry cork (b) a plastic ruler (c) a paper strip (d) a safety pin
  30. 30.True or false: a plastic straw is a conductor. (a) True (b) False
  31. 31.🔦 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
  32. 32.True or false: a glass marble is an insulator. (a) True (b) False
  33. 33.🔦 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) No (b) Yes
  34. 34.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a ceramic cup across the gap. Does the bulb glow? (a) Yes (b) No
  35. 35.True or false: a dry cork is an insulator. (a) False (b) True
  36. 36.🔦 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
  37. 37.🔍 Which is the odd one out? (a) a rubber band (b) a graphite rod (c) a rubber eraser (d) a wooden stick
  38. 38.True or false: a steel coin is an insulator. (a) False (b) True
  39. 39.🔌 Which part of a screwdriver should an electrician hold? (a) the metal tip (b) the bare end (c) the steel shaft (d) the plastic handle
  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. a ceramic cup
  2. an insulator
  3. True
  4. a brass key
  5. copper
  6. a conductor
  7. a rubber eraser
  8. False
  9. Yes
  10. an insulator
  11. a wooden stick
  12. an insulator
  13. True
  14. an insulator
  15. False
  16. False
  17. False
  18. aluminium foil
  19. True
  20. an insulator
  21. Yes
  22. a steel spoon
  23. a conductor
  24. a rubber eraser
  25. conductors
  26. a conductor
  27. True
  28. an iron nail
  29. a safety pin
  30. False
  31. Yes
  32. True
  33. No
  34. No
  35. True
  36. No
  37. a graphite rod
  38. False
  39. the plastic handle
  40. Yes

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