Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 366 · 40 questions

Remember (Find the topic, use the idea): Find the topic: energy, safety, conductor, closed loop, switches, cells, symbols, series or parallel. Use that lesson’s idea — complete loop, all ON for series, cells add up, one path or many. For sums, write the working and check it again.

1. 1.🔌 Is a steel coin a conductor or an insulator? (a) a conductor (b) an insulator
2. 2.Which of these is not safe? (a) use a cable with cuts (b) take cells out after use (c) keep drinks far away (d) stop if a part gets hot
3. 3.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
4. 4.True or false: a paper strip is an insulator. (a) True (b) False
5. 5.Which of these is a conductor? (a) a glass marble (b) a rubber band (c) a cotton thread (d) a steel coin
6. 6.⚡ What does a traffic signal mainly change electricity into? (a) sound (b) light (c) movement (d) heat
7. 7.🔁 Is the circuit closed or open if a wire has come loose? (a) open (b) closed
8. 8.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) bulb (b) cell (c) junction (d) voltmeter
9. 9.⚠️ Why must we never touch switches with wet hands? (a) water makes it cold (b) water carries current (c) it is just untidy (d) it spoils the paint
10. 10.True or false: if the switch is ON, the circuit is open and no current flows. (a) False (b) True
11. 11.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is ON, B is OFF and C is OFF. Does the bulb glow? (a) No (b) Yes
12. 12.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 1.5 V (c) 0.5 V (d) 15 V
13. 13.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
14. 14.Which of these means the circuit is open? (a) a wire is cut (b) all wires are joined (c) the switch is ON (d) the loop is complete
15. 15.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) junction (b) voltmeter (c) ammeter (d) LED
16. 16.Which of these is not safe? (a) take cells out after use (b) climb an electric pole (c) stay away from pylons (d) dry your hands first
17. 17.Which drawing is the symbol for a cell? (a) a long and a short line (b) two or more cell symbols (c) a circle with an X in it (d) a circle with a cross
18. 18.🔍 Which is the odd one out? (a) an LED lamp (b) a ceiling fan (c) a tube light (d) a street light
19. 19.True or false: two or more cell symbols is the symbol for a junction. (a) True (b) False
20. 20.Which of these means the circuit is closed? (a) a wire is cut (b) a wire has come loose (c) the loop is complete (d) a cell is taken out
21. 21.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
22. 22.🔗 Series or parallel circuit: “a single current path”? (a) series (b) parallel
23. 23.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
24. 24.🔦 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
25. 25.Which of these is safe? (a) open a phone charger (b) touch a switch when wet (c) poke things in a socket (d) dry your hands first
26. 26.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
27. 27.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) to make bulbs dim (d) each gets full voltage
28. 28.🔋 A 3 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
29. 29.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
30. 30.⚡ What does a school bell mainly change electricity into? (a) sound (b) light (c) movement (d) heat
31. 31.💡 5 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
32. 32.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
33. 33.Which of these mainly gives out light? (a) a traffic signal (b) an electric kettle (c) a toaster (d) an electric toy car
34. 34.Which of these is safe? (a) touch a switch when wet (b) stop if a part gets hot (c) throw cells in a fire (d) use mains for a project
35. 35.🔍 Which is the odd one out? (a) a copper wire (b) a metal paper clip (c) a rubber band (d) a safety pin
36. 36.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
37. 37.⚡ What does a torch mainly change electricity into? (a) sound (b) heat (c) light (d) movement
38. 38.💡 In a series circuit, how many paths does the current have? (a) two (b) none (c) one (d) one for each bulb
39. 39.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they get dimmer (c) they all go out (d) they keep glowing
40. 40.True or false: if a cell is taken out, the circuit is closed and current flows. (a) True (b) False

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