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Electronics Worksheet: Conductors and Insulators

Electronics lesson 3: Conductors and insulators · Set 41 · 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.🔌 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
  2. 2.True or false: a steel coin is an insulator. (a) True (b) False
  3. 3.🔌 A gap of dry air between two wires acts as … (a) a cell (b) a conductor (c) an insulator (d) a switch that is ON
  4. 4.Which of these is a conductor? (a) a rubber band (b) a wooden stick (c) a graphite rod (d) a rubber eraser
  5. 5.🔌 Is a rubber eraser a conductor or an insulator? (a) an insulator (b) a conductor
  6. 6.True or false: a paper strip is a conductor. (a) False (b) True
  7. 7.Which of these is an insulator? (a) a steel coin (b) a steel spoon (c) a graphite rod (d) a wooden stick
  8. 8.🔦 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
  9. 9.🔦 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
  10. 10.🔦 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
  11. 11.Which of these is a conductor? (a) a cotton thread (b) a plastic straw (c) a metal paper clip (d) a wooden stick
  12. 12.🔌 Is aluminium foil a conductor or an insulator? (a) a conductor (b) an insulator
  13. 13.🔌 Is a wooden stick a conductor or an insulator? (a) a conductor (b) an insulator
  14. 14.Which of these is a conductor? (a) aluminium foil (b) a rubber eraser (c) a plastic straw (d) a cotton thread
  15. 15.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a graphite rod across the gap. Does the bulb glow? (a) No (b) Yes
  16. 16.🔍 Which is the odd one out? (a) a plastic ruler (b) a dry cork (c) a graphite rod (d) a wooden stick
  17. 17.🔌 Which metal is used for most electric wires at home? (a) copper (b) rubber (c) plastic (d) glass
  18. 18.True or false: a glass marble is an insulator. (a) True (b) False
  19. 19.🔍 Which is the odd one out? (a) a woollen thread (b) a steel spoon (c) a plastic ruler (d) a dry cork
  20. 20.True or false: a rubber eraser is a conductor. (a) True (b) False
  21. 21.🔍 Which is the odd one out? (a) a plastic ruler (b) a cotton thread (c) a rubber eraser (d) a brass key
  22. 22.🔌 Is a copper wire a conductor or an insulator? (a) a conductor (b) an insulator
  23. 23.True or false: a plastic straw is an insulator. (a) True (b) False
  24. 24.🔌 Which part of a screwdriver should an electrician hold? (a) the metal tip (b) the steel shaft (c) the bare end (d) the plastic handle
  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.🔦 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) No (b) Yes
  27. 27.Which of these is a conductor? (a) a plastic straw (b) a wooden stick (c) a ceramic cup (d) a steel spoon
  28. 28.Which of these is an insulator? (a) a brass key (b) a steel coin (c) a ceramic cup (d) a steel spoon
  29. 29.Which of these is an insulator? (a) a steel spoon (b) a cotton thread (c) a steel coin (d) an iron nail
  30. 30.🔌 Is a cotton thread a conductor or an insulator? (a) an insulator (b) a conductor
  31. 31.Which of these is a conductor? (a) a woollen thread (b) a wooden stick (c) a plastic ruler (d) a steel coin
  32. 32.Which of these is an insulator? (a) a rubber eraser (b) a brass key (c) a copper wire (d) a graphite rod
  33. 33.🔌 Is a steel spoon a conductor or an insulator? (a) an insulator (b) a conductor
  34. 34.Which of these is a conductor? (a) a rubber band (b) a safety pin (c) a ceramic cup (d) a plastic ruler
  35. 35.🔦 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
  36. 36.🔦 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
  37. 37.True or false: a cotton thread is a conductor. (a) True (b) False
  38. 38.🔌 Is a woollen thread a conductor or an insulator? (a) a conductor (b) an insulator
  39. 39.True or false: a plastic ruler is a conductor. (a) True (b) False
  40. 40.Which of these is an insulator? (a) aluminium foil (b) a graphite rod (c) a metal paper clip (d) a rubber band

Answer key

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

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