Electronics Worksheet: Conductors and Insulators

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

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids