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Electronics Worksheet: Conductors and Insulators

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

Answer key

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

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