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Electronics Worksheet: Conductors and Insulators

Electronics lesson 3: Conductors and insulators · Set 92 · 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.True or false: an iron nail is an insulator. (a) False (b) True
  2. 2.Which of these is an insulator? (a) a metal paper clip (b) a copper wire (c) a rubber band (d) a steel spoon
  3. 3.🔍 Which is the odd one out? (a) a rubber band (b) a cotton thread (c) a woollen thread (d) aluminium foil
  4. 4.🔌 Which metal is used for most electric wires at home? (a) glass (b) rubber (c) copper (d) plastic
  5. 5.🔌 Most metals are good … (a) conductors (b) magnets only (c) insulators (d) batteries
  6. 6.🔍 Which is the odd one out? (a) aluminium foil (b) a safety pin (c) an iron nail (d) a dry cork
  7. 7.🔌 A gap of dry air between two wires acts as … (a) an insulator (b) a switch that is ON (c) a cell (d) a conductor
  8. 8.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a glass marble across the gap. Does the bulb glow? (a) Yes (b) No
  9. 9.Which of these is a conductor? (a) a glass marble (b) a dry cork (c) a brass key (d) a wooden stick
  10. 10.🔍 Which is the odd one out? (a) a plastic ruler (b) aluminium foil (c) a safety pin (d) an iron nail
  11. 11.Which of these is a conductor? (a) a wooden stick (b) a cotton thread (c) a steel coin (d) a dry cork
  12. 12.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
  13. 13.🔦 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
  14. 14.🔦 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
  15. 15.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel spoon across the gap. Does the bulb glow? (a) Yes (b) No
  16. 16.True or false: a rubber eraser is a conductor. (a) True (b) False
  17. 17.True or false: an iron nail is a conductor. (a) True (b) False
  18. 18.🔌 Is a steel coin a conductor or an insulator? (a) a conductor (b) an insulator
  19. 19.🔍 Which is the odd one out? (a) a cotton thread (b) an iron nail (c) a copper wire (d) a steel spoon
  20. 20.Which of these is an insulator? (a) a metal paper clip (b) a steel spoon (c) a graphite rod (d) a ceramic cup
  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.Which of these is an insulator? (a) a metal paper clip (b) an iron nail (c) a cotton thread (d) a steel spoon
  23. 23.🔌 Is a dry cork a conductor or an insulator? (a) an insulator (b) a conductor
  24. 24.True or false: a glass marble is a conductor. (a) False (b) True
  25. 25.🔍 Which is the odd one out? (a) a ceramic cup (b) a metal paper clip (c) a rubber band (d) a cotton thread
  26. 26.🔌 Is a plastic straw a conductor or an insulator? (a) an insulator (b) a conductor
  27. 27.🔦 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) No (b) Yes
  28. 28.Which of these is an insulator? (a) a safety pin (b) a steel coin (c) an iron nail (d) a paper strip
  29. 29.🔦 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
  30. 30.Which of these is a conductor? (a) a plastic ruler (b) a dry cork (c) a paper strip (d) an iron nail
  31. 31.True or false: aluminium foil is an insulator. (a) False (b) True
  32. 32.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic is a conductor (c) plastic is an insulator (d) plastic makes current
  33. 33.True or false: a plastic ruler is an insulator. (a) True (b) False
  34. 34.🔦 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
  35. 35.🔌 Is a brass key a conductor or an insulator? (a) a conductor (b) an insulator
  36. 36.🔦 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
  37. 37.🔍 Which is the odd one out? (a) a safety pin (b) a wooden stick (c) an iron nail (d) a copper wire
  38. 38.🔌 Is a copper wire a conductor or an insulator? (a) a conductor (b) an insulator
  39. 39.Which of these is an insulator? (a) a rubber eraser (b) a steel spoon (c) a copper wire (d) a graphite rod
  40. 40.🔌 Is an iron nail a conductor or an insulator? (a) a conductor (b) an insulator

Answer key

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

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