Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 253 · 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.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
2. 2.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
3. 3.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is OFF and B is ON. Does the bulb glow? (a) Yes (b) No
4. 4.💡 4 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
5. 5.True or false: a traffic signal mainly makes sound. (a) True (b) False
6. 6.🔌 Is a ceramic cup a conductor or an insulator? (a) a conductor (b) an insulator
7. 7.🔌 Is a glass marble a conductor or an insulator? (a) an insulator (b) a conductor
8. 8.🔌 Is a steel coin a conductor or an insulator? (a) a conductor (b) an insulator
9. 9.True or false: to keep drinks far away is not safe. (a) False (b) True
10. 10.🔦 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) No (b) Yes
11. 11.Which of these is not safe? (a) touch a switch when wet (b) stay away from pylons (c) use small battery cells (d) keep drinks far away
12. 12.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True
13. 13.True or false: if the loop is complete, the circuit is open and no current flows. (a) False (b) True
14. 14.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) dotted circles (c) straight lines (d) wavy lines
15. 15.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) battery (b) diode (c) LED (d) voltmeter
16. 16.🔌 Is a copper wire a conductor or an insulator? (a) a conductor (b) an insulator
17. 17.Which of these is safe? (a) dry your hands first (b) poke things in a socket (c) touch a switch when wet (d) touch a fallen wire
18. 18.Which of these is not safe? (a) climb an electric pole (b) stay away from pylons (c) build with an adult near (d) keep drinks far away
19. 19.💡 3 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
20. 20.🔍 Which is the odd one out? (a) dry your hands first (b) take cells out after use (c) build with an adult near (d) throw cells in a fire
21. 21.True or false: a push button stays where you flip it. (a) True (b) False
22. 22.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
23. 23.🔋 A 6 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
24. 24.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
25. 25.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. How many bulbs glow?
26. 26.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
27. 27.True or false: a circle with an X in it is the symbol for a capacitor. (a) True (b) False
28. 28.🔋 How many 1.5 V cells must be joined in series to give 12 V?
29. 29.Which of these mainly gives out light? (a) a street light (b) a table fan (c) a room heater (d) an electric toy car
30. 30.True or false: a rubber eraser is an insulator. (a) False (b) True
31. 31.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
32. 32.True or false: a toggle switch flips up or down. (a) True (b) False
33. 33.Which of these is safe? (a) throw cells in a fire (b) use small battery cells (c) open a phone charger (d) use mains for a project
34. 34.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
35. 35.🔘 When a switch is ON, the circuit is … (a) cut (b) closed (c) open (d) broken
36. 36.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
37. 37.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
38. 38.Which of these uses electricity? (a) a computer (b) a bicycle dynamo (c) a solar panel (d) a power station
39. 39.💡 5 identical bulbs are joined in series with a 15 V battery (ideal wires). How many volts does each bulb get? =
40. 40.True or false: “a single current path” is true of a series circuit. (a) False (b) True

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