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Electronics Worksheet: Conductors and Insulators

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

Answer key

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

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