Electronics Worksheet: Conductors and Insulators

Electronics lesson 3: Conductors and insulators · Set 66 · 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 steel spoon across the gap. Does the bulb glow? (a) No (b) Yes
2. 2.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a paper strip across the gap. Does the bulb glow? (a) No (b) Yes
3. 3.🔍 Which is the odd one out? (a) a metal paper clip (b) a steel coin (c) a ceramic cup (d) a safety pin
4. 4.Which of these is a conductor? (a) a paper strip (b) a rubber band (c) a copper wire (d) a plastic straw
5. 5.True or false: a steel coin is an insulator. (a) False (b) True
6. 6.Which of these is a conductor? (a) a brass key (b) a ceramic cup (c) a cotton thread (d) a rubber band
7. 7.🔍 Which is the odd one out? (a) a graphite rod (b) a rubber band (c) a safety pin (d) an iron nail
8. 8.True or false: a wooden stick is a conductor. (a) True (b) False
9. 9.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) plastic is an insulator (c) to make them heavy (d) plastic makes current
10. 10.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) Yes (b) No
11. 11.🔍 Which is the odd one out? (a) a cotton thread (b) a graphite rod (c) a ceramic cup (d) a plastic straw
12. 12.True or false: a glass marble is an insulator. (a) False (b) True
13. 13.Which of these is an insulator? (a) a rubber band (b) an iron nail (c) a steel spoon (d) a copper wire
14. 14.True or false: a wooden stick is an insulator. (a) True (b) False
15. 15.🔍 Which is the odd one out? (a) a plastic straw (b) a steel coin (c) a paper strip (d) a plastic ruler
16. 16.Which of these is a conductor? (a) a rubber eraser (b) a paper strip (c) a metal paper clip (d) a wooden stick
17. 17.🔍 Which is the odd one out? (a) a dry cork (b) a woollen thread (c) a glass marble (d) a steel spoon
18. 18.True or false: a metal paper clip is an insulator. (a) True (b) False
19. 19.🔍 Which is the odd one out? (a) a plastic straw (b) a cotton thread (c) an iron nail (d) a paper strip
20. 20.🔌 Most metals are good … (a) magnets only (b) insulators (c) conductors (d) batteries
21. 21.True or false: a woollen thread is an insulator. (a) False (b) True
22. 22.🔍 Which is the odd one out? (a) a cotton thread (b) a rubber eraser (c) a glass marble (d) a copper wire
23. 23.🔌 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
24. 24.Which of these is a conductor? (a) a graphite rod (b) a cotton thread (c) a plastic ruler (d) a dry cork
25. 25.🔦 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
26. 26.True or false: a graphite rod is an insulator. (a) True (b) False
27. 27.Which of these is an insulator? (a) aluminium foil (b) a copper wire (c) an iron nail (d) a plastic straw
28. 28.🔌 Which metal is used for most electric wires at home? (a) rubber (b) glass (c) plastic (d) copper
29. 29.Which of these is an insulator? (a) a graphite rod (b) a copper wire (c) a rubber eraser (d) a metal paper clip
30. 30.Which of these is an insulator? (a) a metal paper clip (b) a steel spoon (c) a cotton thread (d) a steel coin
31. 31.Which of these is an insulator? (a) a graphite rod (b) a plastic ruler (c) an iron nail (d) a metal paper clip
32. 32.🔌 Is aluminium foil a conductor or an insulator? (a) a conductor (b) an insulator
33. 33.🔍 Which is the odd one out? (a) aluminium foil (b) a dry cork (c) a safety pin (d) an iron nail
34. 34.🔌 Is a graphite rod a conductor or an insulator? (a) a conductor (b) an insulator
35. 35.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic ruler across the gap. Does the bulb glow? (a) No (b) Yes
36. 36.🔦 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
37. 37.🔌 A gap of dry air between two wires acts as … (a) an insulator (b) a conductor (c) a switch that is ON (d) a cell
38. 38.True or false: a brass key is a conductor. (a) False (b) True
39. 39.Which of these is a conductor? (a) an iron nail (b) a glass marble (c) a cotton thread (d) a woollen thread
40. 40.Which of these is a conductor? (a) a ceramic cup (b) a rubber eraser (c) a paper strip (d) a steel spoon

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