Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 72 · 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.🔋 How many 1.5 V cells must be joined in series to give 6 V?
2. 2.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
3. 3.⚠️ Is it safe to poke things in a socket? (a) not safe (b) safe
4. 4.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) photons (c) electrons (d) water drops
5. 5.Which drawing is the symbol for an LED? (a) triangle, bar and arrows (b) two or more cell symbols (c) one tall, one short bar (d) a circle with a cross
6. 6.Which of these means the circuit is open? (a) the switch is ON (b) the loop is complete (c) all wires are joined (d) a cell is taken out
7. 7.⚡ What does an electric toy car mainly change electricity into? (a) heat (b) sound (c) light (d) movement
8. 8.🔍 Which is the odd one out? (a) touch a fallen wire (b) build with an adult near (c) touch a switch when wet (d) poke things in a socket
9. 9.True or false: if the loop is complete, the circuit is closed and current flows. (a) False (b) True
10. 10.True or false: an iron nail is a conductor. (a) True (b) False
11. 11.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
12. 12.💡 2 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
13. 13.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
14. 14.True or false: to stay away from pylons is safe. (a) True (b) False
15. 15.True or false: a small empty box is the symbol for a motor. (a) True (b) False
16. 16.⚠️ Is it safe to touch a switch when wet? (a) not safe (b) safe
17. 17.Which of these uses electricity? (a) a wind turbine (b) a washing machine (c) a battery (d) a power station
18. 18.🔋 Cells joined + to − in a row (series) give … (a) a smaller voltage (b) the same voltage (c) no voltage (d) a bigger voltage
19. 19.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
20. 20.Which of these mainly makes movement? (a) a water heater (b) a ceiling fan (c) an electric iron (d) an electric kettle
21. 21.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) double the voltage (c) the same voltage (d) no voltage
22. 22.⚠️ Is it safe to open a phone charger? (a) safe (b) not safe
23. 23.What does a toggle switch do? (a) closes when tipped over (b) springs back when let go (c) flips up or down (d) closes near a magnet
24. 24.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
25. 25.True or false: to stop if a part gets hot is safe. (a) True (b) False
26. 26.💡 In a series circuit, how many paths does the current have? (a) two (b) none (c) one (d) one for each bulb
27. 27.✏️ Why do engineers draw circuits with symbols? (a) quick and clear for all (b) symbols are heavier (c) to hide the circuit (d) to make it colourful
28. 28.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
29. 29.Which of these is a conductor? (a) a glass marble (b) a rubber band (c) a ceramic cup (d) a brass key
30. 30.💡 Why is house wiring done in parallel? (a) so all go off together (b) to make bulbs dim (c) each gets full voltage (d) to save copper only
31. 31.True or false: a table fan mainly makes movement. (a) True (b) False
32. 32.Which drawing is the symbol for a battery? (a) triangle against a bar (b) many long-short pairs (c) a circle with an X in it (d) a long and a short line
33. 33.True or false: a circle with A inside is the symbol for a motor. (a) False (b) True
34. 34.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
35. 35.True or false: if the bulb is unscrewed, the circuit is closed and current flows. (a) True (b) False
36. 36.🔦 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) No (b) Yes
37. 37.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
38. 38.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they get dimmer (c) they all go out (d) they keep glowing
39. 39.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) an inverter socket (c) a mains extension board (d) a small battery pack
40. 40.⚠️ Who should be with you when you build a circuit? (a) a stranger online (b) nobody (c) a younger child (d) a trusted adult

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