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Electronics Worksheet: Conductors and Insulators

Electronics lesson 3: Conductors and insulators · Set 16 · 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 a conductor? (a) a woollen thread (b) a rubber band (c) a graphite rod (d) a ceramic cup
  2. 2.True or false: a safety pin is an insulator. (a) True (b) False
  3. 3.🔦 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
  4. 4.🔦 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
  5. 5.🔌 Is a plastic straw a conductor or an insulator? (a) a conductor (b) an insulator
  6. 6.🔌 Which part of a screwdriver should an electrician hold? (a) the plastic handle (b) the bare end (c) the steel shaft (d) the metal tip
  7. 7.🔌 Most metals are good … (a) conductors (b) insulators (c) batteries (d) magnets only
  8. 8.🔌 Which metal is used for most electric wires at home? (a) glass (b) plastic (c) copper (d) rubber
  9. 9.True or false: a cotton thread is an insulator. (a) False (b) True
  10. 10.🔍 Which is the odd one out? (a) a wooden stick (b) aluminium foil (c) a metal paper clip (d) a steel spoon
  11. 11.🔌 Is a steel spoon a conductor or an insulator? (a) an insulator (b) a conductor
  12. 12.🔍 Which is the odd one out? (a) a glass marble (b) a metal paper clip (c) a rubber eraser (d) a paper strip
  13. 13.🔍 Which is the odd one out? (a) a ceramic cup (b) a plastic straw (c) a safety pin (d) a cotton thread
  14. 14.Which of these is a conductor? (a) a plastic straw (b) a metal paper clip (c) a dry cork (d) a ceramic cup
  15. 15.True or false: a copper wire is a conductor. (a) False (b) True
  16. 16.Which of these is a conductor? (a) a steel coin (b) a plastic ruler (c) a rubber band (d) a paper strip
  17. 17.Which of these is a conductor? (a) a plastic ruler (b) a plastic straw (c) a safety pin (d) a wooden stick
  18. 18.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) a cell (c) an insulator (d) a switch that is ON
  19. 19.True or false: a glass marble is a conductor. (a) True (b) False
  20. 20.🔦 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
  21. 21.True or false: a steel coin is a conductor. (a) False (b) True
  22. 22.True or false: a ceramic cup is a conductor. (a) False (b) True
  23. 23.🔍 Which is the odd one out? (a) a wooden stick (b) a rubber band (c) a paper strip (d) a brass key
  24. 24.True or false: a woollen thread is a conductor. (a) False (b) True
  25. 25.🔍 Which is the odd one out? (a) a glass marble (b) a plastic ruler (c) a wooden stick (d) a steel spoon
  26. 26.🔦 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
  27. 27.🔦 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
  28. 28.🔌 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
  29. 29.🔌 Is a paper strip a conductor or an insulator? (a) a conductor (b) an insulator
  30. 30.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
  31. 31.🔍 Which is the odd one out? (a) a woollen thread (b) a steel spoon (c) a graphite rod (d) a copper wire
  32. 32.🔍 Which is the odd one out? (a) a rubber band (b) aluminium foil (c) a dry cork (d) a wooden stick
  33. 33.🔌 Is a cotton thread a conductor or an insulator? (a) a conductor (b) an insulator
  34. 34.True or false: a plastic straw is a conductor. (a) False (b) True
  35. 35.Which of these is a conductor? (a) a glass marble (b) a wooden stick (c) a plastic ruler (d) a steel spoon
  36. 36.🔍 Which is the odd one out? (a) a steel spoon (b) a graphite rod (c) a steel coin (d) a plastic ruler
  37. 37.🔦 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
  38. 38.🔌 Is a glass marble a conductor or an insulator? (a) a conductor (b) an insulator
  39. 39.🔌 Is a copper wire a conductor or an insulator? (a) a conductor (b) an insulator
  40. 40.True or false: a brass key is an insulator. (a) False (b) True

Answer key

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

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