Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 833 · 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 of these is safe? (a) fly a kite near wires (b) use mains for a project (c) stay away from pylons (d) use a cable with cuts
2. 2.⚠️ Why must we never touch switches with wet hands? (a) water makes it cold (b) water carries current (c) it spoils the paint (d) it is just untidy
3. 3.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
4. 4.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
5. 5.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is ON. Does the bulb glow? (a) No (b) Yes
6. 6.🔌 Is a paper strip a conductor or an insulator? (a) an insulator (b) a conductor
7. 7.💡 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
8. 8.🔋 Does a water pump give electricity or use electricity? (a) uses electricity (b) gives electricity
9. 9.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 230 V (c) 0.5 V (d) 1.5 V
10. 10.True or false: to take cells out after use is not safe. (a) True (b) False
11. 11.Which of these is true of a parallel circuit? (a) each gets the full volts (b) one bulb out, all go out (c) a single current path (d) bulbs share the voltage
12. 12.🔘 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 ON. Does the bulb glow? (a) No (b) Yes
13. 13.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) none (c) two (d) one
14. 14.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) cell (b) switch (c) bulb (d) voltmeter
15. 15.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
16. 16.🔦 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) Yes (b) No
17. 17.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
18. 18.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
19. 19.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the longer line (c) the shorter line (d) neither line
20. 20.⚡ What does a traffic signal mainly change electricity into? (a) sound (b) heat (c) light (d) movement
21. 21.🔋 How many 1.2 V cells must be joined in series to give 8.4 V?
22. 22.⚠️ Is it safe to take cells out after use? (a) safe (b) not safe
23. 23.Which of these mainly gives out light? (a) a torch (b) a rice cooker (c) a school bell (d) a doorbell
24. 24.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) in parallel (c) not joined (d) in series
25. 25.Which of these is not safe? (a) use small battery cells (b) fly kites in open fields (c) take cells out after use (d) open a phone charger
26. 26.🔦 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 dry cork. Does the bulb glow? (a) No (b) Yes
27. 27.🔋 How many 2 V cells must be joined in series to give 4 V?
28. 28.Which of these means the circuit is open? (a) the switch is ON (b) all wires are joined (c) the bulb is unscrewed (d) the loop is complete
29. 29.True or false: to use mains for a project is not safe. (a) False (b) True
30. 30.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True
31. 31.What does a reed switch do? (a) closes near a magnet (b) flips up or down (c) slides side to side (d) stays where you flip it
32. 32.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) dotted circles (c) wavy lines (d) little stars
33. 33.💡 4 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
34. 34.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
35. 35.Which of these is an insulator? (a) a metal paper clip (b) a brass key (c) a ceramic cup (d) a steel coin
36. 36.Which of these uses electricity? (a) a power station (b) a computer (c) a solar panel (d) a generator
37. 37.⚡ What do we call a flow of electric charge through a wire? (a) electric current (b) friction (c) a magnet (d) sound
38. 38.True or false: to touch a switch when wet is safe. (a) True (b) False
39. 39.🔘 What does a switch do in a circuit? (a) makes electricity (b) stores current (c) opens or closes the loop (d) changes the voltage
40. 40.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) closed (b) open

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