Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 410 · 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 battery lights 4 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
2. 2.💡 Why is house wiring done in parallel? (a) so all go off together (b) each gets full voltage (c) to save copper only (d) to make bulbs dim
3. 3.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) little stars (c) wavy lines (d) dotted circles
4. 4.🔘 Which kind of switch slides side to side? (a) a reed switch (b) a tilt switch (c) a push button (d) a slide switch
5. 5.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
6. 6.💡 5 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
7. 7.🔦 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
8. 8.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the filament (b) the glass (c) the switch (d) the base
9. 9.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
10. 10.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) a cell (c) an insulator (d) a switch that is ON
11. 11.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) bulbs share the voltage (c) each gets the full volts (d) a single current path
12. 12.🔘 Which kind of switch stays where you flip it? (a) a slide switch (b) a push button (c) a reed switch (d) a toggle switch
13. 13.True or false: a circle with A inside is the symbol for an ammeter. (a) True (b) False
14. 14.🔁 What must there be for a current to flow? (a) one loose end (b) a plastic gap (c) a broken path (d) a complete loop
15. 15.⚠️ Is it safe to fly kites in open fields? (a) safe (b) not safe
16. 16.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) cell (b) switch (c) voltmeter (d) junction
17. 17.True or false: a rubber band is an insulator. (a) True (b) False
18. 18.🔘 What does a switch do in a circuit? (a) changes the voltage (b) opens or closes the loop (c) stores current (d) makes electricity
19. 19.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they keep glowing (c) they get dimmer (d) they explode
20. 20.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
21. 21.Which of these is not safe? (a) stop if a part gets hot (b) build with an adult near (c) fly kites in open fields (d) use mains for a project
22. 22.🔌 Most metals are good … (a) conductors (b) magnets only (c) batteries (d) insulators
23. 23.🔋 What should you do with used-up cells? (a) throw them in a fire (b) give them for recycling (c) bury them in soil (d) cut them open
24. 24.Which of these is safe? (a) touch a switch when wet (b) poke things in a socket (c) take cells out after use (d) use a cable with cuts
25. 25.💡 5 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulbs 1 and 4 are taken out of their holders. How many bulbs glow?
26. 26.Which of these uses electricity? (a) an air conditioner (b) a power station (c) a generator (d) a wind turbine
27. 27.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
28. 28.🔍 Which is the odd one out? (a) a woollen thread (b) an iron nail (c) a plastic ruler (d) a wooden stick
29. 29.💡 4 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. Does bulb 2 glow? (a) No (b) Yes
30. 30.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) wire (b) LED (c) motor (d) cell
31. 31.True or false: if the switch is OFF, the circuit is open and no current flows. (a) False (b) True
32. 32.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open
33. 33.Which of these is a conductor? (a) a plastic straw (b) a plastic ruler (c) an iron nail (d) a rubber band
34. 34.🔋 Does a computer give electricity or use electricity? (a) uses electricity (b) gives electricity
35. 35.🔦 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 plastic straw. Does the bulb glow? (a) Yes (b) No
36. 36.⚡ A fan changes electrical energy mainly into which kind of energy? (a) light energy (b) chemical energy (c) movement energy (d) sound energy
37. 37.What does a slide switch do? (a) stays where you flip it (b) slides side to side (c) springs back when let go (d) flips up or down
38. 38.True or false: a circle with V inside is the symbol for an ammeter. (a) False (b) True
39. 39.💡 4 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
40. 40.Which of these is an insulator? (a) a steel spoon (b) a steel coin (c) a rubber eraser (d) an iron nail

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