Electronics Worksheet: Conductors and Insulators

Electronics lesson 3: Conductors and insulators · Set 103 · 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.True or false: an iron nail is a conductor. (a) True (b) False
2. 2.Which of these is an insulator? (a) a plastic straw (b) a steel spoon (c) a steel coin (d) an iron nail
3. 3.🔍 Which is the odd one out? (a) a metal paper clip (b) a woollen thread (c) a copper wire (d) a safety pin
4. 4.True or false: a brass key is a conductor. (a) False (b) True
5. 5.🔌 Most metals are good … (a) insulators (b) conductors (c) magnets only (d) batteries
6. 6.🔌 Is a glass marble a conductor or an insulator? (a) a conductor (b) an insulator
7. 7.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) plastic is an insulator (c) plastic is a conductor (d) to make them heavy
8. 8.🔍 Which is the odd one out? (a) a safety pin (b) a metal paper clip (c) a copper wire (d) a wooden stick
9. 9.🔍 Which is the odd one out? (a) a brass key (b) a steel coin (c) a plastic straw (d) a steel spoon
10. 10.🔦 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) Yes (b) No
11. 11.🔌 Is a rubber eraser a conductor or an insulator? (a) a conductor (b) an insulator
12. 12.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
13. 13.🔌 Is a paper strip a conductor or an insulator? (a) an insulator (b) a conductor
14. 14.True or false: a metal paper clip is a conductor. (a) False (b) True
15. 15.🔍 Which is the odd one out? (a) a metal paper clip (b) a dry cork (c) a copper wire (d) a graphite rod
16. 16.🔦 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) Yes (b) No
17. 17.🔌 Which part of a screwdriver should an electrician hold? (a) the plastic handle (b) the metal tip (c) the bare end (d) the steel shaft
18. 18.🔌 Is a graphite rod a conductor or an insulator? (a) a conductor (b) an insulator
19. 19.🔦 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) No (b) Yes
20. 20.True or false: a dry cork is an insulator. (a) False (b) True
21. 21.🔌 Is a cotton thread a conductor or an insulator? (a) a conductor (b) an insulator
22. 22.Which of these is an insulator? (a) a copper wire (b) a metal paper clip (c) a wooden stick (d) a steel spoon
23. 23.🔌 Is a steel coin a conductor or an insulator? (a) an insulator (b) a conductor
24. 24.Which of these is a conductor? (a) a plastic straw (b) a glass marble (c) an iron nail (d) a rubber band
25. 25.🔌 Which metal is used for most electric wires at home? (a) copper (b) rubber (c) plastic (d) glass
26. 26.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) an insulator (c) a switch that is ON (d) a cell
27. 27.🔍 Which is the odd one out? (a) a glass marble (b) a steel coin (c) a steel spoon (d) a brass key
28. 28.🔦 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
29. 29.🔍 Which is the odd one out? (a) an iron nail (b) a plastic ruler (c) a glass marble (d) a paper strip
30. 30.Which of these is an insulator? (a) a steel coin (b) aluminium foil (c) a ceramic cup (d) a steel spoon
31. 31.Which of these is an insulator? (a) a metal paper clip (b) an iron nail (c) a steel coin (d) a rubber eraser
32. 32.True or false: a steel coin is an insulator. (a) False (b) True
33. 33.🔍 Which is the odd one out? (a) a steel spoon (b) a cotton thread (c) a glass marble (d) a rubber eraser
34. 34.Which of these is a conductor? (a) a glass marble (b) a metal paper clip (c) a cotton thread (d) a rubber eraser
35. 35.🔦 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
36. 36.Which of these is a conductor? (a) a glass marble (b) a steel spoon (c) a plastic straw (d) a rubber band
37. 37.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
38. 38.🔌 Is a wooden stick a conductor or an insulator? (a) a conductor (b) an insulator
39. 39.Which of these is an insulator? (a) a copper wire (b) a graphite rod (c) a safety pin (d) a rubber band
40. 40.🔍 Which is the odd one out? (a) a rubber eraser (b) a rubber band (c) a dry cork (d) a safety pin

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