Electronics Worksheet: Conductors and Insulators

Electronics lesson 3: Conductors and insulators · Set 102 · 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 a conductor? (a) a ceramic cup (b) a plastic straw (c) a rubber band (d) a safety pin
2. 2.True or false: a rubber band is a conductor. (a) True (b) False
3. 3.Which of these is an insulator? (a) a cotton thread (b) a steel spoon (c) a safety pin (d) a brass key
4. 4.Which of these is an insulator? (a) a graphite rod (b) an iron nail (c) a wooden stick (d) aluminium foil
5. 5.True or false: a steel spoon is a conductor. (a) False (b) True
6. 6.🔦 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
7. 7.🔦 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
8. 8.Which of these is an insulator? (a) a ceramic cup (b) a copper wire (c) a brass key (d) an iron nail
9. 9.Which of these is an insulator? (a) a graphite rod (b) a paper strip (c) a copper wire (d) a safety pin
10. 10.🔌 Which part of a screwdriver should an electrician hold? (a) the bare end (b) the metal tip (c) the plastic handle (d) the steel shaft
11. 11.🔌 Most metals are good … (a) insulators (b) magnets only (c) batteries (d) conductors
12. 12.🔍 Which is the odd one out? (a) a woollen thread (b) a ceramic cup (c) a metal paper clip (d) a paper strip
13. 13.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic makes current (c) plastic is a conductor (d) plastic is an insulator
14. 14.Which of these is a conductor? (a) a plastic ruler (b) a dry cork (c) a steel coin (d) a glass marble
15. 15.True or false: a ceramic cup is an insulator. (a) True (b) False
16. 16.🔦 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
17. 17.🔌 Is a graphite rod a conductor or an insulator? (a) an insulator (b) a conductor
18. 18.Which of these is a conductor? (a) a plastic ruler (b) a wooden stick (c) a cotton thread (d) a steel spoon
19. 19.🔍 Which is the odd one out? (a) a rubber eraser (b) a metal paper clip (c) a safety pin (d) a copper wire
20. 20.🔍 Which is the odd one out? (a) a paper strip (b) a glass marble (c) a plastic straw (d) a steel coin
21. 21.Which of these is an insulator? (a) a steel coin (b) a graphite rod (c) a safety pin (d) a plastic straw
22. 22.🔌 Is a plastic ruler a conductor or an insulator? (a) a conductor (b) an insulator
23. 23.🔌 A gap of dry air between two wires acts as … (a) a switch that is ON (b) a conductor (c) an insulator (d) a cell
24. 24.Which of these is a conductor? (a) a rubber band (b) a copper wire (c) a ceramic cup (d) a cotton thread
25. 25.🔍 Which is the odd one out? (a) a plastic straw (b) a copper wire (c) a ceramic cup (d) a woollen thread
26. 26.🔌 Is a plastic straw a conductor or an insulator? (a) a conductor (b) an insulator
27. 27.🔌 Is a glass marble a conductor or an insulator? (a) a conductor (b) an insulator
28. 28.Which of these is an insulator? (a) a glass marble (b) a brass key (c) a steel spoon (d) a safety pin
29. 29.🔦 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
30. 30.Which of these is a conductor? (a) a woollen thread (b) a graphite rod (c) a glass marble (d) a dry cork
31. 31.🔌 Is a safety pin a conductor or an insulator? (a) an insulator (b) a conductor
32. 32.True or false: a plastic ruler is an insulator. (a) True (b) False
33. 33.🔍 Which is the odd one out? (a) a steel spoon (b) a paper strip (c) a steel coin (d) a copper wire
34. 34.🔍 Which is the odd one out? (a) a plastic straw (b) an iron nail (c) a dry cork (d) a woollen thread
35. 35.Which of these is an insulator? (a) a metal paper clip (b) an iron nail (c) a steel spoon (d) a plastic ruler
36. 36.🔍 Which is the odd one out? (a) a wooden stick (b) a cotton thread (c) a paper strip (d) a steel spoon
37. 37.🔌 Is a ceramic cup a conductor or an insulator? (a) an insulator (b) a conductor
38. 38.🔦 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
39. 39.True or false: a dry cork is a conductor. (a) False (b) True
40. 40.🔍 Which is the odd one out? (a) a copper wire (b) a safety pin (c) a graphite rod (d) a woollen thread

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