Electronics Worksheet: Conductors and Insulators

Electronics lesson 3: Conductors and insulators · Set 10 · 40 questions

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.

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

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