Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 122 · 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: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
2. 2.🔋 How many 1.5 V cells must be joined in series to give 12 V?
3. 3.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 3 glow? (a) Yes (b) No
4. 4.✏️ Why do engineers draw circuits with symbols? (a) quick and clear for all (b) symbols are heavier (c) to hide the circuit (d) to make it colourful
5. 5.🔍 Which is the odd one out? (a) a plastic straw (b) a steel spoon (c) a wooden stick (d) a paper strip
6. 6.Which of these is safe? (a) throw cells in a fire (b) touch a switch when wet (c) use mains for a project (d) build with an adult near
7. 7.True or false: to stop if a part gets hot is not safe. (a) True (b) False
8. 8.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True
9. 9.🔋 Does a solar panel give electricity or use electricity? (a) gives electricity (b) uses electricity
10. 10.True or false: a long and a short line is the symbol for a cell. (a) True (b) False
11. 11.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is ON and C is OFF. Does the bulb glow? (a) No (b) Yes
12. 12.🔍 Which is the odd one out? (a) throw cells in a fire (b) stop if a part gets hot (c) build with an adult near (d) use small battery cells
13. 13.Which of these is a conductor? (a) a plastic straw (b) a woollen thread (c) a safety pin (d) a glass marble
14. 14.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
15. 15.🔍 Which is the odd one out? (a) fly a kite near wires (b) stay away from pylons (c) throw cells in a fire (d) climb an electric pole
16. 16.⚠️ Is it safe to touch a switch when wet? (a) safe (b) not safe
17. 17.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they get dimmer (c) they explode (d) they keep glowing
18. 18.💡 2 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
19. 19.🔋 A 12 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
20. 20.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
21. 21.🔍 Which is the odd one out? (a) dry your hands first (b) use small battery cells (c) fly a kite near wires (d) keep drinks far away
22. 22.🔁 What must there be for a current to flow? (a) a plastic gap (b) a broken path (c) a complete loop (d) one loose end
23. 23.True or false: a circle with A inside is the symbol for an ammeter. (a) False (b) True
24. 24.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) dotted circles (c) little stars (d) straight lines
25. 25.🔦 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 a steel coin. Does the bulb glow? (a) No (b) Yes
26. 26.🔘 Which kind of switch springs back when let go? (a) a reed switch (b) a push button (c) a toggle switch (d) a tilt switch
27. 27.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
28. 28.🔋 How many 1.5 V cells must be joined in series to give 10.5 V?
29. 29.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a steel spoon. Does the bulb glow? (a) Yes (b) No
30. 30.💡 Why is house wiring done in parallel? (a) so all go off together (b) to make bulbs dim (c) each gets full voltage (d) to save copper only
31. 31.True or false: if all wires are joined, the circuit is closed and current flows. (a) False (b) True
32. 32.🔌 A gap of dry air between two wires acts as … (a) a switch that is ON (b) an insulator (c) a conductor (d) a cell
33. 33.🔋 Does a wind turbine give electricity or use electricity? (a) uses electricity (b) gives electricity
34. 34.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic ruler across the gap. Does the bulb glow? (a) No (b) Yes
35. 35.Which of these is not safe? (a) touch a fallen wire (b) stop if a part gets hot (c) build with an adult near (d) dry your hands first
36. 36.🔌 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
37. 37.🔗 Series or parallel circuit: “many paths for current”? (a) parallel (b) series
38. 38.True or false: triangle against a bar is the symbol for a cell. (a) True (b) False
39. 39.🔘 When a switch is ON, the circuit is … (a) cut (b) closed (c) open (d) broken
40. 40.🔋 4 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =

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