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Electronics Worksheet: Conductors and Insulators

Electronics lesson 3: Conductors and insulators · Set 57 · 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 conductor (b) a cell (c) an insulator (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 plastic straw across the gap. Does the bulb glow? (a) Yes (b) No
  3. 3.🔍 Which is the odd one out? (a) a paper strip (b) a rubber band (c) a woollen thread (d) a copper wire
  4. 4.🔦 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
  5. 5.🔌 Which metal is used for most electric wires at home? (a) glass (b) rubber (c) plastic (d) copper
  6. 6.🔍 Which is the odd one out? (a) an iron nail (b) a ceramic cup (c) aluminium foil (d) a graphite rod
  7. 7.🔍 Which is the odd one out? (a) a plastic ruler (b) a rubber band (c) a paper strip (d) a graphite rod
  8. 8.True or false: a woollen thread is a conductor. (a) True (b) False
  9. 9.🔦 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) No (b) Yes
  10. 10.Which of these is a conductor? (a) a wooden stick (b) a rubber eraser (c) a ceramic cup (d) a metal paper clip
  11. 11.🔌 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
  12. 12.🔌 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
  13. 13.🔌 Most metals are good … (a) insulators (b) conductors (c) batteries (d) magnets only
  14. 14.🔍 Which is the odd one out? (a) aluminium foil (b) a safety pin (c) a dry cork (d) a copper wire
  15. 15.Which of these is a conductor? (a) a wooden stick (b) a plastic straw (c) a plastic ruler (d) an iron nail
  16. 16.🔌 Is a copper wire a conductor or an insulator? (a) a conductor (b) an insulator
  17. 17.True or false: a glass marble is an insulator. (a) False (b) True
  18. 18.🔦 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
  19. 19.True or false: a cotton thread is an insulator. (a) True (b) False
  20. 20.Which of these is a conductor? (a) a rubber band (b) a steel coin (c) a glass marble (d) a wooden stick
  21. 21.Which of these is an insulator? (a) a brass key (b) a metal paper clip (c) a steel spoon (d) a glass marble
  22. 22.🔌 Is a plastic straw a conductor or an insulator? (a) a conductor (b) an insulator
  23. 23.🔦 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) Yes (b) No
  24. 24.🔦 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) No (b) Yes
  25. 25.🔌 Is a metal paper clip a conductor or an insulator? (a) a conductor (b) an insulator
  26. 26.Which of these is an insulator? (a) a brass key (b) a steel coin (c) a graphite rod (d) a cotton thread
  27. 27.🔌 Is a paper strip a conductor or an insulator? (a) an insulator (b) a conductor
  28. 28.True or false: a wooden stick is an insulator. (a) False (b) True
  29. 29.Which of these is a conductor? (a) a wooden stick (b) a cotton thread (c) a rubber band (d) a graphite rod
  30. 30.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
  31. 31.🔌 Is a woollen thread a conductor or an insulator? (a) an insulator (b) a conductor
  32. 32.🔌 Is a dry cork a conductor or an insulator? (a) an insulator (b) a conductor
  33. 33.True or false: a graphite rod is a conductor. (a) False (b) True
  34. 34.🔌 Is a plastic ruler a conductor or an insulator? (a) an insulator (b) a conductor
  35. 35.Which of these is an insulator? (a) a safety pin (b) aluminium foil (c) a brass key (d) a woollen thread
  36. 36.True or false: a rubber band is a conductor. (a) True (b) False
  37. 37.True or false: a dry cork is a conductor. (a) False (b) True
  38. 38.🔦 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
  39. 39.🔌 Is a safety pin a conductor or an insulator? (a) an insulator (b) a conductor
  40. 40.🔦 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) Yes (b) No

Answer key

  1. an insulator
  2. No
  3. a copper wire
  4. Yes
  5. copper
  6. a ceramic cup
  7. a graphite rod
  8. False
  9. No
  10. a metal paper clip
  11. the plastic handle
  12. plastic is an insulator
  13. conductors
  14. a dry cork
  15. an iron nail
  16. a conductor
  17. True
  18. Yes
  19. True
  20. a steel coin
  21. a glass marble
  22. an insulator
  23. Yes
  24. No
  25. a conductor
  26. a cotton thread
  27. an insulator
  28. True
  29. a graphite rod
  30. a conductor
  31. an insulator
  32. an insulator
  33. True
  34. an insulator
  35. a woollen thread
  36. False
  37. False
  38. No
  39. a conductor
  40. Yes

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