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Electronics Worksheet: Conductors and Insulators

Electronics lesson 3: Conductors and insulators · Set 77 · 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 is the odd one out? (a) a ceramic cup (b) a safety pin (c) an iron nail (d) a steel coin
  2. 2.🔦 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
  3. 3.🔌 Which metal is used for most electric wires at home? (a) glass (b) plastic (c) copper (d) rubber
  4. 4.🔍 Which is the odd one out? (a) a rubber eraser (b) a plastic ruler (c) a copper wire (d) a wooden stick
  5. 5.True or false: a wooden stick is an insulator. (a) False (b) True
  6. 6.Which of these is a conductor? (a) a rubber band (b) a paper strip (c) an iron nail (d) a plastic straw
  7. 7.🔌 Which part of a screwdriver should an electrician hold? (a) the bare end (b) the steel shaft (c) the metal tip (d) the plastic handle
  8. 8.Which of these is a conductor? (a) a plastic straw (b) a copper wire (c) a woollen thread (d) a glass marble
  9. 9.Which of these is a conductor? (a) a plastic straw (b) a safety pin (c) a rubber band (d) a wooden stick
  10. 10.True or false: a steel spoon is a conductor. (a) True (b) False
  11. 11.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a paper strip across the gap. Does the bulb glow? (a) No (b) Yes
  12. 12.🔌 Is a dry cork a conductor or an insulator? (a) a conductor (b) an insulator
  13. 13.Which of these is an insulator? (a) an iron nail (b) a steel coin (c) a brass key (d) a ceramic cup
  14. 14.🔦 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
  15. 15.🔦 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) Yes (b) No
  16. 16.🔦 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
  17. 17.🔌 Most metals are good … (a) conductors (b) batteries (c) magnets only (d) insulators
  18. 18.True or false: a paper strip is a conductor. (a) False (b) True
  19. 19.True or false: aluminium foil is a conductor. (a) True (b) False
  20. 20.🔍 Which is the odd one out? (a) an iron nail (b) a brass key (c) a plastic straw (d) aluminium foil
  21. 21.🔦 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) Yes (b) No
  22. 22.Which of these is an insulator? (a) a graphite rod (b) a copper wire (c) a brass key (d) a plastic ruler
  23. 23.🔌 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
  24. 24.Which of these is an insulator? (a) a copper wire (b) an iron nail (c) a wooden stick (d) a safety pin
  25. 25.🔦 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) Yes (b) No
  26. 26.🔍 Which is the odd one out? (a) a copper wire (b) a plastic ruler (c) a safety pin (d) a brass key
  27. 27.🔌 Is a cotton thread a conductor or an insulator? (a) a conductor (b) an insulator
  28. 28.🔌 Is a graphite rod a conductor or an insulator? (a) an insulator (b) a conductor
  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 metal paper clip across the gap. Does the bulb glow? (a) No (b) Yes
  31. 31.Which of these is a conductor? (a) a wooden stick (b) a glass marble (c) a plastic straw (d) a steel coin
  32. 32.🔦 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
  33. 33.🔌 Is a steel spoon a conductor or an insulator? (a) an insulator (b) a conductor
  34. 34.True or false: a ceramic cup is an insulator. (a) True (b) False
  35. 35.Which of these is an insulator? (a) a graphite rod (b) a steel spoon (c) a copper wire (d) a plastic straw
  36. 36.🔌 Is a safety pin a conductor or an insulator? (a) an insulator (b) a conductor
  37. 37.🔌 Is a metal paper clip a conductor or an insulator? (a) a conductor (b) an insulator
  38. 38.Which of these is an insulator? (a) an iron nail (b) a safety pin (c) a metal paper clip (d) a cotton thread
  39. 39.🔦 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) Yes (b) No
  40. 40.🔌 A gap of dry air between two wires acts as … (a) a cell (b) a switch that is ON (c) an insulator (d) a conductor

Answer key

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

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