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Electronics Worksheet: Conductors and Insulators

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

Answer key

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

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