Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 752 · 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.True or false: a toggle switch slides side to side. (a) True (b) False
2. 2.💡 2 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
3. 3.🔌 Which part of a screwdriver should an electrician hold? (a) the plastic handle (b) the metal tip (c) the bare end (d) the steel shaft
4. 4.🔍 Which is the odd one out? (a) a buzzer (b) a ceiling fan (c) a loudspeaker (d) a doorbell
5. 5.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) neither line (c) the shorter line (d) the longer line
6. 6.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
7. 7.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by an iron nail. Does the bulb glow? (a) Yes (b) No
8. 8.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
9. 9.True or false: if a wire is cut, the circuit is closed and current flows. (a) True (b) False
10. 10.What does a push button do? (a) closes near a magnet (b) springs back when let go (c) stays where you flip it (d) closes when tipped over
11. 11.🔘 A bulb and a cell are joined through 5 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
12. 12.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
13. 13.🔋 Does a computer give electricity or use electricity? (a) uses electricity (b) gives electricity
14. 14.⚡ What does a buzzer mainly change electricity into? (a) movement (b) sound (c) light (d) heat
15. 15.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
16. 16.🔍 Which is the odd one out? (a) a glass marble (b) an iron nail (c) a wooden stick (d) a plastic ruler
17. 17.🔍 Which is the odd one out? (a) an electric iron (b) a doorbell (c) a rice cooker (d) a water heater
18. 18.🔘 When a switch is ON, the circuit is … (a) closed (b) broken (c) cut (d) open
19. 19.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
20. 20.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
21. 21.Which of these is safe? (a) open a phone charger (b) use a cable with cuts (c) dry your hands first (d) climb an electric pole
22. 22.🔋 How many 3 V cells must be joined in series to give 12 V?
23. 23.True or false: an electric toy car mainly gives out light. (a) False (b) True
24. 24.💡 2 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
25. 25.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
26. 26.⚡ What does a siren mainly change electricity into? (a) sound (b) heat (c) movement (d) light
27. 27.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) each gets full voltage (d) to make bulbs dim
28. 28.Which of these is true of a parallel circuit? (a) a single current path (b) one bulb out, all go out (c) bulbs share the voltage (d) each gets the full volts
29. 29.Which of these is true of a parallel circuit? (a) a single current path (b) a break stops every bulb (c) bulbs share the voltage (d) used in house wiring
30. 30.Which of these is a conductor? (a) a steel coin (b) a cotton thread (c) a plastic straw (d) a woollen thread
31. 31.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
32. 32.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) quick and clear for all (c) symbols are heavier (d) to make it colourful
33. 33.Which of these gives us electricity? (a) a mobile phone (b) a computer (c) a television (d) a power station
34. 34.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. Does the bulb glow? (a) Yes (b) No
35. 35.🔦 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) No (b) Yes
36. 36.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
37. 37.Which of these means the circuit is closed? (a) the switch is OFF (b) a wire is cut (c) a wire has come loose (d) all wires are joined
38. 38.🔌 Is a steel coin a conductor or an insulator? (a) an insulator (b) a conductor
39. 39.⚡ What does a doorbell mainly change electricity into? (a) light (b) sound (c) heat (d) movement
40. 40.Which of these is safe? (a) poke things in a socket (b) use mains for a project (c) build with an adult near (d) climb an electric pole

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