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Electronics Worksheet: Conductors and Insulators

Electronics lesson 3: Conductors and insulators · Set 62 · 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 metal paper clip (b) aluminium foil (c) a woollen thread (d) an iron nail
  2. 2.True or false: a plastic straw is an insulator. (a) False (b) True
  3. 3.🔍 Which is the odd one out? (a) a dry cork (b) a wooden stick (c) a graphite rod (d) a ceramic cup
  4. 4.True or false: a steel spoon is an insulator. (a) True (b) False
  5. 5.Which of these is an insulator? (a) a steel coin (b) an iron nail (c) a steel spoon (d) a paper strip
  6. 6.🔦 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
  7. 7.🔍 Which is the odd one out? (a) a steel coin (b) a ceramic cup (c) a brass key (d) an iron nail
  8. 8.🔍 Which is the odd one out? (a) a brass key (b) a safety pin (c) a copper wire (d) a plastic ruler
  9. 9.Which of these is a conductor? (a) a cotton thread (b) a dry cork (c) a copper wire (d) a plastic ruler
  10. 10.🔌 Which part of a screwdriver should an electrician hold? (a) the metal tip (b) the bare end (c) the plastic handle (d) the steel shaft
  11. 11.🔍 Which is the odd one out? (a) a copper wire (b) a graphite rod (c) an iron nail (d) a rubber eraser
  12. 12.🔌 Is a woollen thread a conductor or an insulator? (a) a conductor (b) an insulator
  13. 13.True or false: aluminium foil is a conductor. (a) True (b) False
  14. 14.🔌 Which metal is used for most electric wires at home? (a) copper (b) rubber (c) plastic (d) glass
  15. 15.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
  16. 16.🔌 Is a plastic ruler a conductor or an insulator? (a) a conductor (b) an insulator
  17. 17.🔍 Which is the odd one out? (a) a plastic ruler (b) a paper strip (c) a brass key (d) a cotton thread
  18. 18.🔦 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
  19. 19.Which of these is an insulator? (a) aluminium foil (b) a brass key (c) an iron nail (d) a rubber band
  20. 20.True or false: a graphite rod is an insulator. (a) True (b) False
  21. 21.🔌 Is a steel coin a conductor or an insulator? (a) a conductor (b) an insulator
  22. 22.🔍 Which is the odd one out? (a) a dry cork (b) a plastic straw (c) a plastic ruler (d) a steel coin
  23. 23.True or false: a paper strip is a conductor. (a) True (b) False
  24. 24.Which of these is a conductor? (a) a metal paper clip (b) a rubber band (c) a plastic ruler (d) a plastic straw
  25. 25.🔌 Most metals are good … (a) conductors (b) insulators (c) magnets only (d) batteries
  26. 26.🔌 Is a rubber band a conductor or an insulator? (a) an insulator (b) a conductor
  27. 27.🔍 Which is the odd one out? (a) a metal paper clip (b) a copper wire (c) a steel spoon (d) a woollen thread
  28. 28.True or false: a dry cork is an insulator. (a) True (b) False
  29. 29.True or false: a copper wire is a conductor. (a) False (b) True
  30. 30.🔌 Why are electric wires covered in plastic? (a) plastic is an insulator (b) to make them heavy (c) plastic makes current (d) plastic is a conductor
  31. 31.Which of these is an insulator? (a) a brass key (b) an iron nail (c) a wooden stick (d) a steel spoon
  32. 32.🔌 Is a steel spoon a conductor or an insulator? (a) a conductor (b) an insulator
  33. 33.🔌 Is a safety pin a conductor or an insulator? (a) a conductor (b) an insulator
  34. 34.True or false: an iron nail is an insulator. (a) True (b) False
  35. 35.True or false: a ceramic cup is an insulator. (a) True (b) False
  36. 36.True or false: a cotton thread is a conductor. (a) True (b) False
  37. 37.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) a switch that is ON (c) an insulator (d) a cell
  38. 38.Which of these is a conductor? (a) a rubber band (b) a ceramic cup (c) aluminium foil (d) a plastic ruler
  39. 39.True or false: a plastic straw is a conductor. (a) False (b) True
  40. 40.🔦 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) No (b) Yes

Answer key

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

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