Electronics Worksheet: Conductors and Insulators

Electronics lesson 3: Conductors and insulators · Set 107 · 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.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber band across the gap. Does the bulb glow? (a) No (b) Yes
2. 2.🔌 Which metal is used for most electric wires at home? (a) rubber (b) copper (c) glass (d) plastic
3. 3.🔌 Is a glass marble a conductor or an insulator? (a) a conductor (b) an insulator
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 part of a screwdriver should an electrician hold? (a) the plastic handle (b) the bare end (c) the metal tip (d) the steel shaft
6. 6.🔦 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
7. 7.🔍 Which is the odd one out? (a) a wooden stick (b) aluminium foil (c) a steel spoon (d) a brass key
8. 8.🔍 Which is the odd one out? (a) a ceramic cup (b) a safety pin (c) a steel spoon (d) a steel coin
9. 9.True or false: a safety pin is an insulator. (a) True (b) False
10. 10.🔍 Which is the odd one out? (a) a graphite rod (b) a copper wire (c) a dry cork (d) aluminium foil
11. 11.🔌 Is a rubber eraser a conductor or an insulator? (a) an insulator (b) a conductor
12. 12.🔌 Most metals are good … (a) conductors (b) insulators (c) magnets only (d) batteries
13. 13.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic is an insulator (c) plastic is a conductor (d) plastic makes current
14. 14.Which of these is a conductor? (a) a steel spoon (b) a rubber band (c) a plastic ruler (d) a woollen thread
15. 15.Which of these is an insulator? (a) a paper strip (b) aluminium foil (c) a copper wire (d) a metal paper clip
16. 16.🔌 Is a metal paper clip a conductor or an insulator? (a) a conductor (b) an insulator
17. 17.🔌 A gap of dry air between two wires acts as … (a) an insulator (b) a cell (c) a switch that is ON (d) a conductor
18. 18.🔦 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
19. 19.True or false: a dry cork is a conductor. (a) True (b) False
20. 20.🔌 Is a cotton thread a conductor or an insulator? (a) a conductor (b) an insulator
21. 21.🔦 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
22. 22.🔍 Which is the odd one out? (a) a ceramic cup (b) a plastic straw (c) a cotton thread (d) a metal paper clip
23. 23.Which of these is an insulator? (a) a rubber eraser (b) a copper wire (c) a graphite rod (d) a steel spoon
24. 24.Which of these is an insulator? (a) an iron nail (b) a rubber band (c) a graphite rod (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 metal paper clip across the gap. Does the bulb glow? (a) No (b) Yes
26. 26.🔦 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
27. 27.🔌 Is a graphite rod a conductor or an insulator? (a) an insulator (b) a conductor
28. 28.🔍 Which is the odd one out? (a) a safety pin (b) a metal paper clip (c) a glass marble (d) aluminium foil
29. 29.Which of these is a conductor? (a) a plastic straw (b) a paper strip (c) a copper wire (d) a woollen thread
30. 30.🔌 Is a paper strip a conductor or an insulator? (a) an insulator (b) a conductor
31. 31.🔍 Which is the odd one out? (a) a steel spoon (b) a ceramic cup (c) a cotton thread (d) a glass marble
32. 32.Which of these is a conductor? (a) a plastic ruler (b) a ceramic cup (c) a paper strip (d) a brass key
33. 33.🔦 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) No (b) Yes
34. 34.🔍 Which is the odd one out? (a) a paper strip (b) a woollen thread (c) a rubber band (d) an iron nail
35. 35.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
36. 36.🔌 Is a steel coin a conductor or an insulator? (a) an insulator (b) a conductor
37. 37.🔦 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
38. 38.🔍 Which is the odd one out? (a) a ceramic cup (b) a safety pin (c) a cotton thread (d) a plastic straw
39. 39.🔦 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) No (b) Yes
40. 40.🔦 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

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