Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 497 · 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.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are ON (b) never (c) when either is ON (d) only when both are OFF
2. 2.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) a mains extension board (c) an inverter socket (d) a small battery pack
3. 3.⚠️ Is it safe to build with an adult near? (a) safe (b) not safe
4. 4.What does a reed switch do? (a) flips up or down (b) closes near a magnet (c) closes when tipped over (d) springs back when let go
5. 5.💡 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) dimmer (c) brighter
6. 6.💡 5 identical bulbs are joined in series with a 10 V battery (ideal wires). How many volts does each bulb get? =
7. 7.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is OFF and C is ON. Does the bulb glow? (a) Yes (b) No
8. 8.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) all wires are joined (c) a wire is cut (d) the switch is OFF
9. 9.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a metal paper clip across the gap. Does the bulb glow? (a) Yes (b) No
10. 10.🔍 Which is the odd one out? (a) use a cable with cuts (b) fly a kite near wires (c) stop if a part gets hot (d) open a phone charger
11. 11.True or false: to build with an adult near is safe. (a) True (b) False
12. 12.Which of these is true of a series circuit? (a) one out, the rest glow (b) used in house wiring (c) many paths for current (d) bulbs share the voltage
13. 13.💡 3 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
14. 14.⚠️ Is it safe to climb an electric pole? (a) safe (b) not safe
15. 15.Which of these is an insulator? (a) a brass key (b) a steel spoon (c) a cotton thread (d) a safety pin
16. 16.🔘 Which kind of switch slides side to side? (a) a reed switch (b) a tilt switch (c) a toggle switch (d) a slide switch
17. 17.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) wavy lines (c) straight lines (d) little stars
18. 18.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) switch (b) battery (c) bulb (d) ammeter
19. 19.Which of these mainly makes movement? (a) a toaster (b) a siren (c) an electric toy car (d) a night lamp
20. 20.🔍 Which is the odd one out? (a) a brass key (b) aluminium foil (c) a cotton thread (d) a safety pin
21. 21.🔋 How many 2 V cells must be joined in series to give 16 V?
22. 22.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
23. 23.Which of these mainly gives out light? (a) an electric kettle (b) a toaster (c) an electric iron (d) a torch
24. 24.Which of these is not safe? (a) stop if a part gets hot (b) dry your hands first (c) touch a switch when wet (d) fly kites in open fields
25. 25.🔍 Which is the odd one out? (a) use small battery cells (b) use a cable with cuts (c) stay away from pylons (d) take cells out after use
26. 26.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
27. 27.🔋 2 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
28. 28.🔌 Is a graphite rod a conductor or an insulator? (a) an insulator (b) a conductor
29. 29.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) diode (b) resistor (c) voltmeter (d) LED
30. 30.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a graphite rod across the gap. Does the bulb glow? (a) No (b) Yes
31. 31.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
32. 32.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) water drops (c) electrons (d) photons
33. 33.💡 In a series circuit, how many paths does the current have? (a) two (b) one for each bulb (c) one (d) none
34. 34.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
35. 35.Which of these is safe? (a) climb an electric pole (b) dry your hands first (c) touch a fallen wire (d) use mains for a project
36. 36.⚡ What does a night lamp mainly change electricity into? (a) light (b) sound (c) heat (d) movement
37. 37.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) resistor (b) junction (c) cell (d) bulb
38. 38.True or false: a copper wire is an insulator. (a) False (b) True
39. 39.Which drawing is the symbol for a wire? (a) a plain rectangle (b) a straight line (c) triangle against a bar (d) two or more cell symbols
40. 40.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series

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