Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 1 · 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: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
2. 2.True or false: to keep drinks far away is not safe. (a) False (b) True
3. 3.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
4. 4.🔦 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
5. 5.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
6. 6.🔋 Does a battery give electricity or use electricity? (a) uses electricity (b) gives electricity
7. 7.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put an iron nail across the gap. Does the bulb glow? (a) Yes (b) No
8. 8.🔍 Which is the odd one out? (a) use small battery cells (b) stay away from pylons (c) touch a fallen wire (d) keep drinks far away
9. 9.True or false: a table fan mainly gives out light. (a) True (b) False
10. 10.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
11. 11.⚠️ Is it safe to dry your hands first? (a) safe (b) not safe
12. 12.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a safe circuit (b) a short circuit (c) a parallel circuit (d) an open circuit
13. 13.✏️ 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
14. 14.🔦 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 brass key. Does the bulb glow? (a) Yes (b) No
15. 15.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
16. 16.⚡ What do we call a flow of electric charge through a wire? (a) electric current (b) sound (c) friction (d) a magnet
17. 17.Which of these means the circuit is closed? (a) a cell is taken out (b) the bulb is unscrewed (c) a wire is cut (d) all wires are joined
18. 18.True or false: a mixer grinder mainly makes movement. (a) False (b) True
19. 19.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) light energy (b) sound energy (c) movement energy (d) chemical energy
20. 20.True or false: a night lamp mainly makes movement. (a) False (b) True
21. 21.🔗 Series or parallel circuit: “one out, the rest glow”? (a) series (b) parallel
22. 22.True or false: if all wires are joined, the circuit is closed and current flows. (a) True (b) False
23. 23.Which of these mainly makes sound? (a) an electric toy car (b) a rice cooker (c) a doorbell (d) a water heater
24. 24.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
25. 25.True or false: if a cell is taken out, the circuit is open and no current flows. (a) False (b) True
26. 26.🔌 Is a woollen thread a conductor or an insulator? (a) an insulator (b) a conductor
27. 27.True or false: if the bulb is unscrewed, the circuit is closed and current flows. (a) True (b) False
28. 28.🔌 Is a ceramic cup a conductor or an insulator? (a) a conductor (b) an insulator
29. 29.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
30. 30.True or false: to open a phone charger is not safe. (a) True (b) False
31. 31.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) wire (b) junction (c) capacitor (d) battery
32. 32.🔋 A 3 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
33. 33.🔍 Which is the odd one out? (a) open a phone charger (b) throw cells in a fire (c) use mains for a project (d) stop if a part gets hot
34. 34.What does a toggle switch do? (a) springs back when let go (b) works only while pressed (c) slides side to side (d) stays where you flip it
35. 35.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 230 V (c) 1.5 V (d) 0.5 V
36. 36.Which of these mainly makes movement? (a) a traffic signal (b) a table fan (c) a toaster (d) a water heater
37. 37.🔘 Which kind of switch flips up or down? (a) a toggle switch (b) a reed switch (c) a tilt switch (d) a push button
38. 38.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
39. 39.🔌 Is a paper strip a conductor or an insulator? (a) a conductor (b) an insulator
40. 40.🔍 Which is the odd one out? (a) a glass marble (b) a cotton thread (c) a metal paper clip (d) a dry cork

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