Electronics Worksheet: Conductors and Insulators

Electronics lesson 3: Conductors and insulators · Set 69 · 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 of these is an insulator? (a) a paper strip (b) a copper wire (c) an iron nail (d) a brass key
2. 2.🔦 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
3. 3.Which of these is an insulator? (a) a steel spoon (b) a steel coin (c) a metal paper clip (d) a plastic ruler
4. 4.🔌 Why are electric wires covered in plastic? (a) plastic is an insulator (b) to make them heavy (c) plastic is a conductor (d) plastic makes current
5. 5.🔦 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) Yes (b) No
6. 6.🔌 A gap of dry air between two wires acts as … (a) a cell (b) an insulator (c) a switch that is ON (d) a conductor
7. 7.True or false: a rubber band is a conductor. (a) False (b) True
8. 8.🔍 Which is the odd one out? (a) a cotton thread (b) a glass marble (c) a ceramic cup (d) a steel coin
9. 9.🔌 Is a wooden stick a conductor or an insulator? (a) an insulator (b) a conductor
10. 10.Which of these is an insulator? (a) a safety pin (b) an iron nail (c) a cotton thread (d) a steel spoon
11. 11.🔦 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) Yes (b) No
12. 12.Which of these is an insulator? (a) a graphite rod (b) a plastic straw (c) a safety pin (d) a steel spoon
13. 13.Which of these is a conductor? (a) a dry cork (b) a paper strip (c) a wooden stick (d) a metal paper clip
14. 14.True or false: a safety pin is an insulator. (a) False (b) True
15. 15.🔌 Is a copper wire a conductor or an insulator? (a) an insulator (b) a conductor
16. 16.Which of these is an insulator? (a) a metal paper clip (b) a copper wire (c) a graphite rod (d) a dry cork
17. 17.🔌 Is a dry cork a conductor or an insulator? (a) an insulator (b) a conductor
18. 18.🔦 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
19. 19.🔌 Most metals are good … (a) batteries (b) conductors (c) magnets only (d) insulators
20. 20.🔍 Which is the odd one out? (a) aluminium foil (b) a rubber band (c) a plastic ruler (d) a paper strip
21. 21.🔍 Which is the odd one out? (a) a steel coin (b) aluminium foil (c) a plastic ruler (d) a metal paper clip
22. 22.🔌 Which part of a screwdriver should an electrician hold? (a) the plastic handle (b) the bare end (c) the steel shaft (d) the metal tip
23. 23.🔌 Which metal is used for most electric wires at home? (a) rubber (b) glass (c) plastic (d) copper
24. 24.🔦 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
25. 25.True or false: a plastic ruler is an insulator. (a) True (b) False
26. 26.Which of these is a conductor? (a) a dry cork (b) a rubber band (c) a steel spoon (d) a rubber eraser
27. 27.True or false: a dry cork is a conductor. (a) True (b) False
28. 28.🔌 Is a steel spoon a conductor or an insulator? (a) an insulator (b) a conductor
29. 29.🔍 Which is the odd one out? (a) a ceramic cup (b) a brass key (c) a steel spoon (d) an iron nail
30. 30.True or false: a glass marble is an insulator. (a) False (b) True
31. 31.🔍 Which is the odd one out? (a) a metal paper clip (b) aluminium foil (c) a wooden stick (d) an iron nail
32. 32.True or false: a safety pin is a conductor. (a) True (b) False
33. 33.🔌 Is a rubber eraser a conductor or an insulator? (a) a conductor (b) an insulator
34. 34.🔍 Which is the odd one out? (a) a metal paper clip (b) a cotton thread (c) a dry cork (d) a ceramic cup
35. 35.True or false: a rubber eraser is a conductor. (a) True (b) False
36. 36.True or false: aluminium foil is a conductor. (a) True (b) False
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 paper strip (b) a plastic ruler (c) a rubber band (d) a graphite rod
39. 39.True or false: a copper wire is an insulator. (a) False (b) True
40. 40.True or false: a wooden stick is a conductor. (a) True (b) False

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