Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 54 · 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 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
2. 2.🔍 Which is the odd one out? (a) poke things in a socket (b) use small battery cells (c) use mains for a project (d) touch a switch when wet
3. 3.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one bulb out, all go out (c) one out, the rest glow (d) a single current path
4. 4.⚡ What do we call a flow of electric charge through a wire? (a) sound (b) electric current (c) friction (d) a magnet
5. 5.🔋 What is a battery? (a) a kind of bulb (b) one single wire (c) two or more cells joined (d) a switch with a lid
6. 6.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
7. 7.🔌 Which metal is used for most electric wires at home? (a) copper (b) rubber (c) glass (d) plastic
8. 8.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) switch (b) resistor (c) bulb (d) cell
9. 9.🔌 Is a graphite rod a conductor or an insulator? (a) an insulator (b) a conductor
10. 10.💡 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) the same (c) dimmer
11. 11.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they keep glowing (d) they get dimmer
12. 12.True or false: a rubber eraser is an insulator. (a) False (b) True
13. 13.🔘 Which kind of switch stays where you flip it? (a) a reed switch (b) a push button (c) a tilt switch (d) a toggle switch
14. 14.Which of these is safe? (a) use small battery cells (b) use a cable with cuts (c) use mains for a project (d) touch a switch when wet
15. 15.True or false: two equal parallel lines is the symbol for a bulb. (a) True (b) False
16. 16.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) quick and clear for all (c) to hide the circuit (d) to make it colourful
17. 17.True or false: to use mains for a project is not safe. (a) False (b) True
18. 18.What does a reed switch do? (a) closes near a magnet (b) springs back when let go (c) flips up or down (d) stays where you flip it
19. 19.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) wavy lines (c) straight lines (d) dotted circles
20. 20.Which of these gives us electricity? (a) a cell (b) a computer (c) an air conditioner (d) a television
21. 21.🔍 Which is the odd one out? (a) an iron nail (b) a safety pin (c) a woollen thread (d) a graphite rod
22. 22.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the switch (b) the filament (c) the base (d) the glass
23. 23.🔋 Identical cells side by side (in parallel) give … (a) no voltage (b) the same voltage (c) half the voltage (d) double the voltage
24. 24.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
25. 25.True or false: to take cells out after use is not safe. (a) True (b) False
26. 26.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
27. 27.Which of these means the circuit is open? (a) the bulb is unscrewed (b) the loop is complete (c) the switch is ON (d) all wires are joined
28. 28.Which of these gives us electricity? (a) a television (b) a refrigerator (c) a wind turbine (d) an air conditioner
29. 29.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
30. 30.True or false: a push button springs back when let go. (a) True (b) False
31. 31.⚡ Which tiny particles drift along a metal wire to carry the current? (a) water drops (b) dust particles (c) electrons (d) photons
32. 32.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
33. 33.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
34. 34.🔁 Is the circuit closed or open if a cell is taken out? (a) open (b) closed
35. 35.Which of these is safe? (a) open a phone charger (b) climb an electric pole (c) fly a kite near wires (d) take cells out after use
36. 36.True or false: to build with an adult near is not safe. (a) True (b) False
37. 37.True or false: one tall, one short bar is the symbol for a cell. (a) False (b) True
38. 38.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) a toaster (b) a torch (c) a traffic signal (d) an LED lamp
40. 40.💡 4 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. Does bulb 3 glow? (a) Yes (b) No

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