Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 685 · 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 cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a safe circuit (b) a short circuit (c) an open circuit (d) a parallel circuit
2. 2.Which of these is not safe? (a) stay away from pylons (b) take cells out after use (c) use small battery cells (d) use a cable with cuts
3. 3.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
4. 4.⚡ What does a night lamp mainly change electricity into? (a) heat (b) sound (c) light (d) movement
5. 5.🔋 Does a refrigerator give electricity or use electricity? (a) uses electricity (b) gives electricity
6. 6.Which of these is safe? (a) climb an electric pole (b) use a cable with cuts (c) open a phone charger (d) build with an adult near
7. 7.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
8. 8.🔋 How many 2 V cells must be joined in series to give 8 V?
9. 9.🔌 Most metals are good … (a) insulators (b) conductors (c) magnets only (d) batteries
10. 10.Which of these means the circuit is open? (a) the switch is ON (b) a cell is taken out (c) all wires are joined (d) the loop is complete
11. 11.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
12. 12.🔌 Which metal is used for most electric wires at home? (a) plastic (b) rubber (c) copper (d) glass
13. 13.🔘 A bulb and a cell are joined through 4 switches on 4 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
14. 14.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) True (b) False
15. 15.⚠️ Is it safe to dry your hands first? (a) safe (b) not safe
16. 16.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) dotted circles (c) wavy lines (d) straight lines
17. 17.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
18. 18.🔌 Which part of a screwdriver should an electrician hold? (a) the plastic handle (b) the steel shaft (c) the bare end (d) the metal tip
19. 19.What does a slide switch do? (a) stays where you flip it (b) closes when tipped over (c) slides side to side (d) flips up or down
20. 20.💡 4 identical bulbs are joined in series with a 12 V battery (ideal wires). How many volts does each bulb get? =
21. 21.True or false: a toggle switch flips up or down. (a) True (b) False
22. 22.✏️ 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
23. 23.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
24. 24.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel coin across the gap. Does the bulb glow? (a) Yes (b) No
25. 25.True or false: a woollen thread is an insulator. (a) True (b) False
26. 26.⚡ What does an exhaust fan mainly change electricity into? (a) sound (b) heat (c) movement (d) light
27. 27.Which of these is true of a series circuit? (a) many paths for current (b) used in house wiring (c) bulbs share the voltage (d) each gets the full volts
28. 28.⚡ A fan changes electrical energy mainly into which kind of energy? (a) light energy (b) sound energy (c) movement energy (d) chemical energy
29. 29.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) diode (b) bulb (c) ammeter (d) junction
30. 30.Which drawing is the symbol for a cell? (a) triangle, bar and arrows (b) a long and a short line (c) a circle with A inside (d) a straight line
31. 31.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) voltmeter (b) capacitor (c) ammeter (d) cell
32. 32.Which of these mainly makes sound? (a) a night lamp (b) a table fan (c) a school bell (d) a room heater
33. 33.🔘 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 ON and C is ON. Does the bulb glow? (a) Yes (b) No
34. 34.True or false: a night lamp mainly makes movement. (a) True (b) False
35. 35.Which of these uses electricity? (a) a cell (b) a wind turbine (c) a computer (d) a generator
36. 36.💡 Why is house wiring done in parallel? (a) so all go off together (b) each gets full voltage (c) to save copper only (d) to make bulbs dim
37. 37.🔍 Which is the odd one out? (a) a cotton thread (b) aluminium foil (c) a brass key (d) an iron nail
38. 38.🔍 Which is the odd one out? (a) touch a switch when wet (b) touch a fallen wire (c) use small battery cells (d) climb an electric pole
39. 39.True or false: a rice cooker mainly gives out heat. (a) True (b) False
40. 40.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True

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