Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 432 · 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: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
2. 2.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
3. 3.🔋 4 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
4. 4.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) wavy lines (c) dotted circles (d) little stars
5. 5.🔘 Which kind of switch slides side to side? (a) a slide switch (b) a tilt switch (c) a push button (d) a reed switch
6. 6.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a paper strip across the gap. Does the bulb glow? (a) No (b) Yes
7. 7.True or false: “a single current path” is true of a series circuit. (a) True (b) False
8. 8.True or false: to use mains for a project is safe. (a) True (b) False
9. 9.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
10. 10.🔍 Which is the odd one out? (a) a copper wire (b) a rubber band (c) a brass key (d) a graphite rod
11. 11.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) by Wi-Fi (c) not joined (d) in parallel
12. 12.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) bulb (b) LED (c) motor (d) resistor
13. 13.⚡ What does an exhaust fan mainly change electricity into? (a) heat (b) movement (c) sound (d) light
14. 14.🔌 Is a paper strip a conductor or an insulator? (a) a conductor (b) an insulator
15. 15.🔍 Which is the odd one out? (a) dry your hands first (b) stay away from pylons (c) use small battery cells (d) touch a fallen wire
16. 16.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
17. 17.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) battery (b) switch (c) junction (d) bulb
18. 18.Which of these means the circuit is closed? (a) a wire is cut (b) the loop is complete (c) a cell is taken out (d) the bulb is unscrewed
19. 19.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) motor (b) switch (c) cell (d) resistor
20. 20.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
21. 21.💡 3 identical bulbs are joined in series with a 7.5 V battery (ideal wires). How many volts does each bulb get? =
22. 22.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
23. 23.True or false: a small empty box is the symbol for a resistor. (a) False (b) True
24. 24.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
25. 25.True or false: a brass key is a conductor. (a) True (b) False
26. 26.⚠️ Why must we never touch switches with wet hands? (a) water makes it cold (b) it spoils the paint (c) water carries current (d) it is just untidy
27. 27.True or false: a line lifted at a gap is the symbol for a switch. (a) True (b) False
28. 28.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 4 glow? (a) No (b) Yes
29. 29.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) neither line (c) the shorter line (d) both lines
30. 30.🔘 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 ON. Does the bulb glow? (a) Yes (b) No
31. 31.⚠️ Is it safe to fly kites in open fields? (a) safe (b) not safe
32. 32.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
33. 33.🔍 Which is the odd one out? (a) a wooden stick (b) aluminium foil (c) a graphite rod (d) an iron nail
34. 34.💡 2 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 1 glow? (a) Yes (b) No
35. 35.Which of these means the circuit is open? (a) a wire has come loose (b) the switch is ON (c) the loop is complete (d) all wires are joined
36. 36.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) switch (b) LED (c) bulb (d) battery
37. 37.Which of these is true of a series circuit? (a) used in house wiring (b) a single current path (c) one out, the rest glow (d) many paths for current
38. 38.🔘 A bulb and a cell are joined through 2 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
39. 39.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
40. 40.⚠️ Is it safe to build with an adult near? (a) not safe (b) safe

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