Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 309 · 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.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
2. 2.⚡ Which tiny particles drift along a metal wire to carry the current? (a) photons (b) water drops (c) electrons (d) dust particles
3. 3.🔍 Which is the odd one out? (a) an iron nail (b) a wooden stick (c) a rubber eraser (d) a plastic straw
4. 4.🔍 Which is the odd one out? (a) a toaster (b) a rice cooker (c) an electric toy car (d) a water heater
5. 5.⚡ What do we call a flow of electric charge through a wire? (a) a magnet (b) sound (c) electric current (d) friction
6. 6.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
7. 7.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) little stars (c) straight lines (d) dotted circles
8. 8.⚠️ Is it safe to use a cable with cuts? (a) not safe (b) safe
9. 9.True or false: if a wire has come loose, the circuit is closed and current flows. (a) False (b) True
10. 10.Which of these mainly makes movement? (a) an electric kettle (b) an electric iron (c) a buzzer (d) a ceiling fan
11. 11.🔍 Which is the odd one out? (a) a plastic straw (b) a steel spoon (c) aluminium foil (d) a copper wire
12. 12.🔘 Which kind of switch flips up or down? (a) a slide switch (b) a reed switch (c) a tilt switch (d) a toggle switch
13. 13.⚠️ Is it safe to use small battery cells? (a) not safe (b) safe
14. 14.🔍 Which is the odd one out? (a) throw cells in a fire (b) poke things in a socket (c) build with an adult near (d) climb an electric pole
15. 15.🔋 How many 2 V cells must be joined in series to give 4 V?
16. 16.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
17. 17.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) none (c) two (d) one
18. 18.Which of these is not safe? (a) dry your hands first (b) throw cells in a fire (c) fly kites in open fields (d) use small battery cells
19. 19.⚡ What does a ceiling fan mainly change electricity into? (a) heat (b) light (c) sound (d) movement
20. 20.⚠️ Why must we never touch switches with wet hands? (a) water makes it cold (b) it spoils the paint (c) it is just untidy (d) water carries current
21. 21.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
22. 22.⚠️ Which power source should children use for electronics projects? (a) a mains extension board (b) a wall socket (c) an inverter socket (d) a small battery pack
23. 23.🔦 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 an iron nail. Does the bulb glow? (a) Yes (b) No
24. 24.🔍 Which is the odd one out? (a) a woollen thread (b) a rubber band (c) a brass key (d) a cotton thread
25. 25.⚡ What does a traffic signal mainly change electricity into? (a) heat (b) sound (c) movement (d) light
26. 26.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
27. 27.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
28. 28.💡 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
29. 29.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to make bulbs dim (c) to save copper only (d) so all go off together
30. 30.🔋 A 9 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
31. 31.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) wire (b) motor (c) ammeter (d) bulb
32. 32.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
33. 33.True or false: a buzzer mainly gives out heat. (a) True (b) False
34. 34.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a paper strip. Does the bulb glow? (a) Yes (b) No
35. 35.Which of these is true of a series circuit? (a) a break stops every bulb (b) own switch for each bulb (c) many paths for current (d) used in house wiring
36. 36.True or false: to fly a kite near wires is safe. (a) False (b) True
37. 37.💡 A battery lights 3 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
38. 38.Which of these gives us electricity? (a) a mobile phone (b) a bicycle dynamo (c) an air conditioner (d) a washing machine
39. 39.Which of these uses electricity? (a) a computer (b) a wind turbine (c) a bicycle dynamo (d) a power station
40. 40.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they get dimmer (c) they all go out (d) they keep glowing

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