Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 571 · 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 bulb has two contacts. How many must be joined into the loop for it to glow? (a) it does not matter (b) none (c) only one (d) both of them
2. 2.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
3. 3.True or false: “a single current path” is true of a series circuit. (a) False (b) True
4. 4.💡 A battery lights 4 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
5. 5.🔌 Is a copper wire a conductor or an insulator? (a) a conductor (b) an insulator
6. 6.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) to hide the circuit (c) quick and clear for all (d) symbols are heavier
7. 7.⚠️ Is it safe to dry your hands first? (a) not safe (b) safe
8. 8.True or false: a loudspeaker mainly makes sound. (a) False (b) True
9. 9.Which of these is true of a series circuit? (a) many paths for current (b) one out, the rest glow (c) each gets the full volts (d) a break stops every bulb
10. 10.🔋 A 9 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
11. 11.🔘 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 ON, B is ON and C is OFF. Does the bulb glow? (a) No (b) Yes
12. 12.💡 3 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?
13. 13.🔘 Which kind of switch slides side to side? (a) a reed switch (b) a slide switch (c) a toggle switch (d) a tilt switch
14. 14.Which of these is an insulator? (a) a safety pin (b) a copper wire (c) a plastic ruler (d) a steel spoon
15. 15.💡 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 4 is taken out of its holder. How many bulbs glow?
16. 16.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the base (c) the filament (d) the switch
17. 17.💡 5 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?
18. 18.🔍 Which is the odd one out? (a) an electric iron (b) an electric kettle (c) a room heater (d) a torch
19. 19.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
20. 20.Which of these is safe? (a) climb an electric pole (b) touch a switch when wet (c) use mains for a project (d) take cells out after use
21. 21.Which of these is not safe? (a) build with an adult near (b) dry your hands first (c) poke things in a socket (d) take cells out after use
22. 22.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
23. 23.🔘 A bulb and a cell are joined through 6 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
24. 24.🔘 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 ON, B is ON and C is ON. Does the bulb glow? (a) Yes (b) No
25. 25.🔘 When a switch is ON, the circuit is … (a) cut (b) broken (c) closed (d) open
26. 26.Which of these means the circuit is closed? (a) a wire has come loose (b) the switch is OFF (c) the bulb is unscrewed (d) all wires are joined
27. 27.🔋 Identical cells side by side (in parallel) give … (a) the same voltage (b) double the voltage (c) half the voltage (d) no voltage
28. 28.🔘 Which kind of switch stays where you flip it? (a) a push button (b) a tilt switch (c) a slide switch (d) a toggle switch
29. 29.💡 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 2 is taken out of its holder. Does bulb 3 glow? (a) Yes (b) No
30. 30.🔍 Which is the odd one out? (a) poke things in a socket (b) build with an adult near (c) stop if a part gets hot (d) keep drinks far away
31. 31.Which drawing is the symbol for a wire? (a) a plain rectangle (b) a straight line (c) a circle with A inside (d) triangle, bar and arrows
32. 32.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) cell (b) junction (c) voltmeter (d) battery
33. 33.🔍 Which is the odd one out? (a) a table fan (b) a night lamp (c) a traffic signal (d) an LED lamp
34. 34.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
35. 35.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they all go out (c) they explode (d) they keep glowing
36. 36.🔌 Most metals are good … (a) magnets only (b) conductors (c) insulators (d) batteries
37. 37.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) dotted circles (c) little stars (d) straight lines
38. 38.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) bulb (b) switch (c) cell (d) battery
39. 39.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
40. 40.True or false: to build with an adult near is not safe. (a) False (b) True

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