Electronics Worksheet: Conductors and Insulators

Electronics lesson 3: Conductors and insulators · Set 90 · 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.🔍 Which is the odd one out? (a) a copper wire (b) a rubber eraser (c) an iron nail (d) a steel spoon
2. 2.True or false: an iron nail is a conductor. (a) True (b) False
3. 3.True or false: a cotton thread is an insulator. (a) False (b) True
4. 4.🔌 Most metals are good … (a) magnets only (b) batteries (c) conductors (d) insulators
5. 5.True or false: a paper strip is an insulator. (a) True (b) False
6. 6.True or false: a metal paper clip is a conductor. (a) False (b) True
7. 7.🔌 Is a steel coin a conductor or an insulator? (a) a conductor (b) an insulator
8. 8.🔍 Which is the odd one out? (a) a paper strip (b) a brass key (c) a rubber band (d) a dry cork
9. 9.🔌 Is a graphite rod a conductor or an insulator? (a) an insulator (b) a conductor
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) No (b) Yes
11. 11.Which of these is a conductor? (a) a plastic ruler (b) a rubber eraser (c) a wooden stick (d) aluminium foil
12. 12.Which of these is an insulator? (a) a safety pin (b) an iron nail (c) a glass marble (d) a graphite rod
13. 13.Which of these is a conductor? (a) a plastic straw (b) a cotton thread (c) a dry cork (d) a graphite rod
14. 14.True or false: a copper wire is a conductor. (a) True (b) False
15. 15.🔦 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
16. 16.🔌 Is a cotton thread a conductor or an insulator? (a) an insulator (b) a conductor
17. 17.🔍 Which is the odd one out? (a) a graphite rod (b) a steel spoon (c) a wooden stick (d) a brass key
18. 18.🔍 Which is the odd one out? (a) aluminium foil (b) a rubber band (c) a plastic straw (d) a wooden stick
19. 19.🔍 Which is the odd one out? (a) a metal paper clip (b) a copper wire (c) an iron nail (d) a rubber band
20. 20.🔌 Which part of a screwdriver should an electrician hold? (a) the metal tip (b) the bare end (c) the steel shaft (d) the plastic handle
21. 21.🔦 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
22. 22.🔌 Which metal is used for most electric wires at home? (a) copper (b) plastic (c) rubber (d) glass
23. 23.🔌 Is a plastic straw a conductor or an insulator? (a) a conductor (b) an insulator
24. 24.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a dry cork across the gap. Does the bulb glow? (a) Yes (b) No
25. 25.True or false: a plastic straw is a conductor. (a) True (b) False
26. 26.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) plastic is an insulator (c) to make them heavy (d) plastic is a conductor
27. 27.🔌 Is aluminium foil a conductor or an insulator? (a) a conductor (b) an insulator
28. 28.True or false: aluminium foil is a conductor. (a) False (b) True
29. 29.Which of these is a conductor? (a) a ceramic cup (b) a rubber band (c) a steel coin (d) a plastic straw
30. 30.Which of these is a conductor? (a) a safety pin (b) a cotton thread (c) a plastic ruler (d) a plastic straw
31. 31.🔍 Which is the odd one out? (a) a cotton thread (b) a safety pin (c) a glass marble (d) a plastic straw
32. 32.🔌 A gap of dry air between two wires acts as … (a) a switch that is ON (b) a conductor (c) a cell (d) an insulator
33. 33.🔍 Which is the odd one out? (a) a cotton thread (b) a graphite rod (c) a plastic ruler (d) a paper strip
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) No (b) Yes
35. 35.True or false: a ceramic cup is an insulator. (a) True (b) False
36. 36.Which of these is an insulator? (a) a steel coin (b) a copper wire (c) an iron nail (d) a rubber eraser
37. 37.True or false: aluminium foil is an insulator. (a) True (b) False
38. 38.Which of these is a conductor? (a) a ceramic cup (b) a copper wire (c) a woollen thread (d) a paper strip
39. 39.🔌 Is a paper strip a conductor or an insulator? (a) a conductor (b) an insulator
40. 40.🔍 Which is the odd one out? (a) an iron nail (b) a paper strip (c) a graphite rod (d) a brass key

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