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Electronics Worksheet: Conductors and Insulators

Electronics lesson 3: Conductors and insulators · Set 74 · 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.🔌 A gap of dry air between two wires acts as … (a) a cell (b) an insulator (c) a conductor (d) a switch that is ON
  2. 2.🔦 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) Yes (b) No
  3. 3.True or false: a glass marble is an insulator. (a) False (b) True
  4. 4.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic makes current (c) plastic is a conductor (d) plastic is an insulator
  5. 5.🔦 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
  6. 6.🔍 Which is the odd one out? (a) an iron nail (b) a safety pin (c) a rubber band (d) a copper wire
  7. 7.🔦 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
  8. 8.Which of these is a conductor? (a) a glass marble (b) a dry cork (c) a paper strip (d) a metal paper clip
  9. 9.Which of these is an insulator? (a) a plastic straw (b) a steel coin (c) a copper wire (d) a metal paper clip
  10. 10.🔌 Is a graphite rod a conductor or an insulator? (a) a conductor (b) an insulator
  11. 11.🔌 Is a paper strip a conductor or an insulator? (a) a conductor (b) an insulator
  12. 12.🔦 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
  13. 13.🔌 Is an iron nail a conductor or an insulator? (a) a conductor (b) an insulator
  14. 14.True or false: a steel coin is an insulator. (a) False (b) True
  15. 15.🔌 Is a brass key a conductor or an insulator? (a) an insulator (b) a conductor
  16. 16.True or false: a rubber eraser is a conductor. (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 steel coin across the gap. Does the bulb glow? (a) No (b) Yes
  18. 18.Which of these is an insulator? (a) a steel spoon (b) a copper wire (c) a steel coin (d) a glass marble
  19. 19.🔍 Which is the odd one out? (a) a safety pin (b) a copper wire (c) a woollen thread (d) a metal paper clip
  20. 20.True or false: a dry cork is a conductor. (a) True (b) False
  21. 21.Which of these is a conductor? (a) a paper strip (b) a plastic straw (c) a graphite rod (d) a woollen thread
  22. 22.True or false: a brass key is an insulator. (a) True (b) False
  23. 23.🔍 Which is the odd one out? (a) a copper wire (b) a ceramic cup (c) a glass marble (d) a woollen thread
  24. 24.🔌 Which metal is used for most electric wires at home? (a) copper (b) glass (c) plastic (d) rubber
  25. 25.🔍 Which is the odd one out? (a) a safety pin (b) aluminium foil (c) a rubber eraser (d) a brass key
  26. 26.🔦 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) No (b) Yes
  27. 27.🔌 Is a dry cork a conductor or an insulator? (a) a conductor (b) an insulator
  28. 28.🔌 Is a rubber eraser a conductor or an insulator? (a) an insulator (b) a conductor
  29. 29.🔦 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) No (b) Yes
  30. 30.Which of these is an insulator? (a) a copper wire (b) a paper strip (c) a graphite rod (d) a brass key
  31. 31.🔍 Which is the odd one out? (a) a rubber band (b) a dry cork (c) a paper strip (d) a safety pin
  32. 32.True or false: a safety pin is an insulator. (a) True (b) False
  33. 33.Which of these is a conductor? (a) a safety pin (b) a plastic ruler (c) a rubber band (d) a ceramic cup
  34. 34.🔌 Is a rubber band a conductor or an insulator? (a) an insulator (b) a conductor
  35. 35.🔌 Is a safety pin a conductor or an insulator? (a) a conductor (b) an insulator
  36. 36.Which of these is an insulator? (a) a safety pin (b) a copper wire (c) a steel spoon (d) a rubber band
  37. 37.🔌 Is a steel spoon a conductor or an insulator? (a) an insulator (b) a conductor
  38. 38.🔌 Is a plastic straw a conductor or an insulator? (a) an insulator (b) a conductor
  39. 39.🔌 Is a wooden stick a conductor or an insulator? (a) a conductor (b) an insulator
  40. 40.🔦 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) Yes (b) No

Answer key

  1. an insulator
  2. No
  3. True
  4. plastic is an insulator
  5. No
  6. a rubber band
  7. Yes
  8. a metal paper clip
  9. a plastic straw
  10. a conductor
  11. an insulator
  12. Yes
  13. a conductor
  14. False
  15. a conductor
  16. False
  17. Yes
  18. a glass marble
  19. a woollen thread
  20. False
  21. a graphite rod
  22. False
  23. a copper wire
  24. copper
  25. a rubber eraser
  26. No
  27. an insulator
  28. an insulator
  29. No
  30. a paper strip
  31. a safety pin
  32. False
  33. a safety pin
  34. an insulator
  35. a conductor
  36. a rubber band
  37. a conductor
  38. an insulator
  39. an insulator
  40. No

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