Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 600 · 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 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) No (b) Yes
2. 2.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a plug top (b) a fuse or MCB (c) a bulb (d) a long wire
3. 3.🔘 Which kind of switch stays where you flip it? (a) a reed switch (b) a toggle switch (c) a slide switch (d) a tilt switch
4. 4.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
5. 5.🔦 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) Yes (b) No
6. 6.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) switch (b) diode (c) LED (d) capacitor
7. 7.True or false: a woollen thread is a conductor. (a) True (b) False
8. 8.🔍 Which is the odd one out? (a) use small battery cells (b) touch a fallen wire (c) stop if a part gets hot (d) take cells out after use
9. 9.True or false: if all wires are joined, the circuit is open and no current flows. (a) True (b) False
10. 10.🔌 Which metal is used for most electric wires at home? (a) copper (b) plastic (c) glass (d) rubber
11. 11.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
12. 12.⚠️ About how many volts do home sockets in India supply? (a) 9 V (b) 12 V (c) 230 V (d) 1.5 V
13. 13.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic straw across the gap. Does the bulb glow? (a) Yes (b) No
14. 14.🔘 Which kind of switch closes near a magnet? (a) a toggle switch (b) a push button (c) a slide switch (d) a reed switch
15. 15.What does a toggle switch do? (a) stays where you flip it (b) springs back when let go (c) closes near a magnet (d) slides side to side
16. 16.Which of these mainly gives out light? (a) a toaster (b) a tube light (c) a loudspeaker (d) a ceiling fan
17. 17.🔋 What should you do with used-up cells? (a) cut them open (b) give them for recycling (c) bury them in soil (d) throw them in a fire
18. 18.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) so all go off together (d) each gets full voltage
19. 19.True or false: to keep drinks far away is not safe. (a) True (b) False
20. 20.💡 5 identical bulbs are joined in series with a 10 V battery (ideal wires). How many volts does each bulb get? =
21. 21.💡 A battery lights 2 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
22. 22.🔋 5 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)? =
23. 23.Which of these gives us electricity? (a) a television (b) a generator (c) a mobile phone (d) an air conditioner
24. 24.Which of these is not safe? (a) build with an adult near (b) stop if a part gets hot (c) use mains for a project (d) use small battery cells
25. 25.🔋 How many 1.2 V cells must be joined in series to give 8.4 V?
26. 26.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
27. 27.True or false: to touch a switch when wet is not safe. (a) True (b) False
28. 28.True or false: a steel spoon is an insulator. (a) True (b) False
29. 29.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) capacitor (b) resistor (c) bulb (d) battery
30. 30.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel coin across the gap. Does the bulb glow? (a) Yes (b) No
31. 31.🔘 When a switch is ON, the circuit is … (a) open (b) broken (c) closed (d) cut
32. 32.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) dotted circles (c) little stars (d) straight lines
33. 33.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they get dimmer (c) they keep glowing (d) they explode
34. 34.⚡ What does a room heater mainly change electricity into? (a) light (b) movement (c) sound (d) heat
35. 35.💡 4 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 1 glow? (a) Yes (b) No
36. 36.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
37. 37.🔍 Which is the odd one out? (a) a rubber band (b) a ceramic cup (c) a metal paper clip (d) a wooden stick
38. 38.Which of these mainly gives out heat? (a) an electric kettle (b) a school bell (c) a loudspeaker (d) a table fan
39. 39.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) neither line (c) the longer line (d) both lines
40. 40.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False

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