Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 44 · 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.⚡ What does a loudspeaker mainly change electricity into? (a) light (b) sound (c) heat (d) movement
2. 2.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a glass marble across the gap. Does the bulb glow? (a) No (b) Yes
3. 3.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open
4. 4.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. How many bulbs glow?
5. 5.True or false: if the switch is ON, the circuit is closed and current flows. (a) True (b) False
6. 6.🔦 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 ruler. Does the bulb glow? (a) Yes (b) No
7. 7.🔍 Which is the odd one out? (a) use mains for a project (b) climb an electric pole (c) fly kites in open fields (d) open a phone charger
8. 8.What does a toggle switch do? (a) closes near a magnet (b) flips up or down (c) closes when tipped over (d) works only while pressed
9. 9.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) two (c) none (d) one
10. 10.🔦 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) No (b) Yes
11. 11.🔍 Which is the odd one out? (a) a steel coin (b) a safety pin (c) an iron nail (d) a plastic ruler
12. 12.True or false: a dry cork is a conductor. (a) True (b) False
13. 13.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) straight lines (c) wavy lines (d) dotted circles
14. 14.🔌 Which metal is used for most electric wires at home? (a) copper (b) rubber (c) plastic (d) glass
15. 15.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
16. 16.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) to hide the circuit (c) to make it colourful (d) quick and clear for all
17. 17.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
18. 18.💡 Why is house wiring done in parallel? (a) to save copper only (b) each gets full voltage (c) so all go off together (d) to make bulbs dim
19. 19.🔍 Which is the odd one out? (a) a rice cooker (b) a tube light (c) a water heater (d) an electric iron
20. 20.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
21. 21.True or false: a reed switch works only while pressed. (a) False (b) True
22. 22.🔋 Does a washing machine give electricity or use electricity? (a) gives electricity (b) uses electricity
23. 23.🔋 How many 1.5 V cells must be joined in series to give 4.5 V?
24. 24.🔘 Which kind of switch slides side to side? (a) a reed switch (b) a push button (c) a slide switch (d) a toggle switch
25. 25.Which of these mainly gives out light? (a) a water heater (b) a siren (c) a mixer grinder (d) a torch
26. 26.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they get dimmer (c) they all go out (d) they explode
27. 27.⚡ A cell changes stored chemical energy into which kind of energy? (a) sound energy (b) electrical energy (c) wind energy (d) nuclear energy
28. 28.🔋 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)? =
29. 29.⚡ What does an electric toy car mainly change electricity into? (a) sound (b) movement (c) light (d) heat
30. 30.🔋 What is a battery? (a) a switch with a lid (b) a kind of bulb (c) two or more cells joined (d) one single wire
31. 31.Which of these is a conductor? (a) a cotton thread (b) a glass marble (c) a copper wire (d) a dry cork
32. 32.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
33. 33.True or false: if a cell is taken out, the circuit is closed and current flows. (a) False (b) True
34. 34.Which of these mainly makes movement? (a) a ceiling fan (b) a siren (c) a tube light (d) a rice cooker
35. 35.Which drawing is the symbol for a bulb? (a) a circle with an X in it (b) a small empty box (c) one tall, one short bar (d) two equal parallel lines
36. 36.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
37. 37.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 4 of the switches are OFF and the rest are ON. How many bulbs glow?
38. 38.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) half the voltage (c) no voltage (d) the same voltage
39. 39.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) photons (c) electrons (d) water drops
40. 40.⚠️ Is it safe to throw cells in a fire? (a) not safe (b) safe

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