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Electronics Worksheet: Conductors and Insulators

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

Answer key

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

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