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Electronics Worksheet: Conductors and Insulators

Electronics lesson 3: Conductors and insulators · Set 91 · 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 an iron nail across the gap. Does the bulb glow? (a) No (b) Yes
  2. 2.🔍 Which is the odd one out? (a) a steel coin (b) a wooden stick (c) a plastic straw (d) a cotton thread
  3. 3.🔍 Which is the odd one out? (a) a steel spoon (b) a safety pin (c) aluminium foil (d) a rubber eraser
  4. 4.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
  5. 5.Which of these is a conductor? (a) a plastic ruler (b) a paper strip (c) a woollen thread (d) a safety pin
  6. 6.Which of these is an insulator? (a) an iron nail (b) a steel spoon (c) aluminium foil (d) a plastic ruler
  7. 7.Which of these is an insulator? (a) a steel spoon (b) a safety pin (c) a metal paper clip (d) a woollen thread
  8. 8.🔦 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
  9. 9.🔌 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
  10. 10.True or false: an iron nail is an insulator. (a) True (b) False
  11. 11.🔌 Is a copper wire a conductor or an insulator? (a) a conductor (b) an insulator
  12. 12.🔌 Is a steel spoon a conductor or an insulator? (a) a conductor (b) an insulator
  13. 13.🔌 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
  14. 14.🔍 Which is the odd one out? (a) aluminium foil (b) a paper strip (c) a woollen thread (d) a wooden stick
  15. 15.Which of these is a conductor? (a) aluminium foil (b) a glass marble (c) a rubber eraser (d) a cotton thread
  16. 16.🔌 Is a metal paper clip a conductor or an insulator? (a) a conductor (b) an insulator
  17. 17.🔌 Is a rubber eraser a conductor or an insulator? (a) an insulator (b) a conductor
  18. 18.Which of these is a conductor? (a) a rubber eraser (b) a dry cork (c) a plastic straw (d) a graphite rod
  19. 19.🔌 Most metals are good … (a) conductors (b) batteries (c) magnets only (d) insulators
  20. 20.🔍 Which is the odd one out? (a) a wooden stick (b) a rubber band (c) a brass key (d) a plastic straw
  21. 21.🔦 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
  22. 22.🔌 Is a cotton thread a conductor or an insulator? (a) a conductor (b) an insulator
  23. 23.🔦 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
  24. 24.🔦 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
  25. 25.🔦 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) No (b) Yes
  26. 26.True or false: a wooden stick is a conductor. (a) True (b) False
  27. 27.🔌 Is a dry cork a conductor or an insulator? (a) an insulator (b) a conductor
  28. 28.True or false: a rubber eraser is an insulator. (a) False (b) True
  29. 29.True or false: a cotton thread is a conductor. (a) False (b) True
  30. 30.🔌 Is a rubber band a conductor or an insulator? (a) a conductor (b) an insulator
  31. 31.True or false: a metal paper clip is a conductor. (a) False (b) True
  32. 32.Which of these is a conductor? (a) a plastic straw (b) a steel spoon (c) a woollen thread (d) a wooden stick
  33. 33.Which of these is a conductor? (a) a rubber eraser (b) a dry cork (c) a metal paper clip (d) a glass marble
  34. 34.True or false: a woollen thread is a conductor. (a) True (b) False
  35. 35.🔌 Is a plastic straw a conductor or an insulator? (a) an insulator (b) a conductor
  36. 36.🔌 Which metal is used for most electric wires at home? (a) copper (b) rubber (c) plastic (d) glass
  37. 37.🔍 Which is the odd one out? (a) a brass key (b) an iron nail (c) a glass marble (d) a steel coin
  38. 38.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a dry cork across the gap. Does the bulb glow? (a) No (b) Yes
  39. 39.🔌 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
  40. 40.Which of these is an insulator? (a) a graphite rod (b) an iron nail (c) a rubber band (d) a copper wire

Answer key

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

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