Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 610 · 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.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put aluminium foil across the gap. Does the bulb glow? (a) No (b) Yes
2. 2.🔌 Is a paper strip a conductor or an insulator? (a) an insulator (b) a conductor
3. 3.True or false: a room heater mainly gives out heat. (a) False (b) True
4. 4.What does a toggle switch do? (a) works only while pressed (b) closes near a magnet (c) stays where you flip it (d) springs back when let go
5. 5.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) light energy (b) chemical energy (c) movement energy (d) sound energy
6. 6.Which of these is not safe? (a) dry your hands first (b) take cells out after use (c) use a cable with cuts (d) keep drinks far away
7. 7.🔋 2 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
8. 8.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
9. 9.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
10. 10.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
11. 11.True or false: if a wire is cut, the circuit is open and no current flows. (a) True (b) False
12. 12.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
13. 13.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 6 is taken out of its holder. How many bulbs glow?
14. 14.🔁 What must there be for a current to flow? (a) a broken path (b) a plastic gap (c) a complete loop (d) one loose end
15. 15.🔍 Which is the odd one out? (a) use mains for a project (b) use small battery cells (c) touch a fallen wire (d) open a phone charger
16. 16.🔍 Which is the odd one out? (a) an electric toy car (b) a siren (c) a table fan (d) a mixer grinder
17. 17.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
18. 18.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) dotted circles (c) straight lines (d) little stars
19. 19.⚠️ Is it safe to use mains for a project? (a) not safe (b) safe
20. 20.⚠️ Is it safe to take cells out after use? (a) safe (b) not safe
21. 21.True or false: a toggle switch stays where you flip it. (a) False (b) True
22. 22.💡 3 identical bulbs are joined in series with a 7.5 V battery (ideal wires). How many volts does each bulb get? =
23. 23.True or false: a dot where wires meet is the symbol for a junction. (a) True (b) False
24. 24.💡 2 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
25. 25.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
26. 26.🔘 When a switch is ON, the circuit is … (a) broken (b) cut (c) closed (d) open
27. 27.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
28. 28.🔘 Two switches are in series. When does the bulb glow? (a) when both are ON (b) never (c) when both are OFF (d) when either is ON
29. 29.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) a switch that is ON (c) an insulator (d) a cell
30. 30.🔋 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)? =
31. 31.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
32. 32.🔦 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) No (b) Yes
33. 33.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
34. 34.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
35. 35.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
36. 36.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is OFF. Does the bulb glow? (a) Yes (b) No
37. 37.⚠️ Is it safe to use small battery cells? (a) not safe (b) safe
38. 38.🔘 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 OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
39. 39.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a wooden stick across the gap. Does the bulb glow? (a) Yes (b) No
40. 40.💡 6 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?

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