Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 59 · 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.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
2. 2.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
3. 3.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) straight lines (c) little stars (d) dotted circles
4. 4.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put an iron nail across the gap. Does the bulb glow? (a) Yes (b) No
5. 5.⚡ What does a street light mainly change electricity into? (a) heat (b) sound (c) movement (d) light
6. 6.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
7. 7.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
8. 8.Which of these is a conductor? (a) aluminium foil (b) a plastic ruler (c) a woollen thread (d) a cotton thread
9. 9.🔘 Which kind of switch flips up or down? (a) a toggle switch (b) a reed switch (c) a push button (d) a tilt switch
10. 10.💡 2 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
11. 11.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
12. 12.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
13. 13.True or false: a slide switch stays where you flip it. (a) False (b) True
14. 14.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
15. 15.True or false: to use small battery cells is not safe. (a) True (b) False
16. 16.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
17. 17.🔌 Is a plastic ruler a conductor or an insulator? (a) an insulator (b) a conductor
18. 18.🔍 Which is the odd one out? (a) keep drinks far away (b) use a cable with cuts (c) throw cells in a fire (d) fly a kite near wires
19. 19.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) quick and clear for all (c) symbols are heavier (d) to hide the circuit
20. 20.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
21. 21.Which of these means the circuit is open? (a) all wires are joined (b) the loop is complete (c) the switch is ON (d) the bulb is unscrewed
22. 22.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) cell (b) battery (c) switch (d) capacitor
23. 23.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) True (b) False
24. 24.Which of these uses electricity? (a) a battery (b) a refrigerator (c) a cell (d) a power station
25. 25.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
26. 26.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) when either is ON (c) only when both are ON (d) never
27. 27.🔌 Most metals are good … (a) conductors (b) insulators (c) magnets only (d) batteries
28. 28.🔘 Which kind of switch slides side to side? (a) a tilt switch (b) a toggle switch (c) a push button (d) a slide switch
29. 29.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the switch (b) the glass (c) the filament (d) the base
30. 30.🔋 What should you do with used-up cells? (a) throw them in a fire (b) bury them in soil (c) cut them open (d) give them for recycling
31. 31.⚠️ Is it safe to dry your hands first? (a) safe (b) not safe
32. 32.🔋 What is a battery? (a) one single wire (b) a switch with a lid (c) two or more cells joined (d) a kind of bulb
33. 33.⚠️ Is it safe to throw cells in a fire? (a) not safe (b) safe
34. 34.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the shorter line (c) the longer line (d) neither line
35. 35.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
36. 36.💡 2 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 1 is taken out of its holder. How many bulbs glow?
37. 37.🔁 What must there be for a current to flow? (a) one loose end (b) a plastic gap (c) a broken path (d) a complete loop
38. 38.True or false: if a cell is taken out, the circuit is closed and current flows. (a) True (b) False
39. 39.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is OFF. Does the bulb glow? (a) Yes (b) No
40. 40.⚠️ Is it safe to touch a switch when wet? (a) not safe (b) safe

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