Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 580 · 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.🔍 Which is the odd one out? (a) a ceramic cup (b) a dry cork (c) a cotton thread (d) a metal paper clip
2. 2.Which of these is a conductor? (a) a wooden stick (b) an iron nail (c) a woollen thread (d) a rubber eraser
3. 3.Which of these is a conductor? (a) a plastic straw (b) a steel spoon (c) a woollen thread (d) a glass marble
4. 4.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a mains extension board (c) a wall socket (d) a small battery pack
5. 5.Which of these mainly makes sound? (a) a street light (b) a school bell (c) an electric drill (d) an LED lamp
6. 6.🔋 5 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
7. 7.🔘 Two switches are in series. When does the bulb glow? (a) never (b) when both are ON (c) when both are OFF (d) when either is ON
8. 8.💡 2 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
9. 9.True or false: a plastic ruler is an insulator. (a) False (b) True
10. 10.💡 3 identical bulbs are joined in series with a 9 V battery (ideal wires). How many volts does each bulb get? =
11. 11.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
12. 12.🔘 A bulb and a cell are joined through 5 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
13. 13.Which drawing is the symbol for a wire? (a) a small empty box (b) triangle against a bar (c) one tall, one short bar (d) a straight line
14. 14.🔋 2 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
15. 15.🔗 Series or parallel circuit: “one out, the rest glow”? (a) parallel (b) series
16. 16.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) both lines (c) neither line (d) the longer line
17. 17.🔍 Which is the odd one out? (a) keep drinks far away (b) use small battery cells (c) fly kites in open fields (d) use a cable with cuts
18. 18.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they all go out (c) they get dimmer (d) they keep glowing
19. 19.⚡ A fan changes electrical energy mainly into which kind of energy? (a) chemical energy (b) light energy (c) sound energy (d) movement energy
20. 20.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
21. 21.🔍 Which is the odd one out? (a) a tube light (b) a siren (c) a traffic signal (d) a night lamp
22. 22.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) junction (b) bulb (c) diode (d) voltmeter
23. 23.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
24. 24.True or false: a school bell mainly gives out light. (a) False (b) True
25. 25.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to save copper only (c) to make bulbs dim (d) so all go off together
26. 26.🔍 Which is the odd one out? (a) an iron nail (b) a brass key (c) a plastic ruler (d) a copper wire
27. 27.⚡ What does a siren mainly change electricity into? (a) heat (b) movement (c) light (d) sound
28. 28.Which drawing is the symbol for a bulb? (a) a long and a short line (b) many long-short pairs (c) triangle, bar and arrows (d) a circle with an X in it
29. 29.🔍 Which is the odd one out? (a) climb an electric pole (b) touch a fallen wire (c) dry your hands first (d) use mains for a project
30. 30.⚠️ Is it safe to use a cable with cuts? (a) not safe (b) safe
31. 31.⚠️ Is it safe to take cells out after use? (a) safe (b) not safe
32. 32.Which of these uses electricity? (a) a cell (b) a wind turbine (c) a solar panel (d) a television
33. 33.⚠️ Is it safe to keep drinks far away? (a) safe (b) not safe
34. 34.True or false: if a wire is cut, the circuit is closed and current flows. (a) True (b) False
35. 35.True or false: to take cells out after use is safe. (a) False (b) True
36. 36.🔋 Does a power station give electricity or use electricity? (a) uses electricity (b) gives electricity
37. 37.⚠️ Is it safe to climb an electric pole? (a) not safe (b) safe
38. 38.Which drawing is the symbol for a switch? (a) a circle with a cross (b) two or more cell symbols (c) a long and a short line (d) a line lifted at a gap
39. 39.💡 4 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. Bulb 3 is taken out of its holder. How many bulbs glow?
40. 40.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is OFF, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No

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