Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 290 · 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.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
2. 2.🔍 Which is the odd one out? (a) throw cells in a fire (b) use small battery cells (c) open a phone charger (d) climb an electric pole
3. 3.🔘 When a switch is ON, the circuit is … (a) closed (b) broken (c) cut (d) open
4. 4.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. Does bulb 1 glow? (a) Yes (b) No
5. 5.💡 4 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?
6. 6.True or false: a graphite rod is an insulator. (a) True (b) False
7. 7.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
8. 8.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
9. 9.🔌 Is a woollen thread a conductor or an insulator? (a) an insulator (b) a conductor
10. 10.💡 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. All the bulbs are in place. How many bulbs glow?
11. 11.🔍 Which is the odd one out? (a) a school bell (b) a loudspeaker (c) a siren (d) a traffic signal
12. 12.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
13. 13.⚡ A fan changes electrical energy mainly into which kind of energy? (a) sound energy (b) chemical energy (c) movement energy (d) light energy
14. 14.Which of these mainly gives out light? (a) a siren (b) a torch (c) a table fan (d) a school bell
15. 15.Which of these mainly makes sound? (a) a torch (b) a night lamp (c) a siren (d) a mixer grinder
16. 16.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) symbols are heavier (c) to make it colourful (d) quick and clear for all
17. 17.Which of these means the circuit is closed? (a) all wires are joined (b) the bulb is unscrewed (c) a cell is taken out (d) a wire has come loose
18. 18.⚡ What does a torch mainly change electricity into? (a) movement (b) light (c) sound (d) heat
19. 19.🔋 Does a mobile phone give electricity or use electricity? (a) gives electricity (b) uses electricity
20. 20.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) no voltage (c) double the voltage (d) the same voltage
21. 21.True or false: a circle with V inside is the symbol for a voltmeter. (a) True (b) False
22. 22.Which of these mainly gives out heat? (a) a torch (b) a loudspeaker (c) an electric kettle (d) a table fan
23. 23.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) No (b) Yes
24. 24.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
25. 25.⚡ What does an electric toy car mainly change electricity into? (a) heat (b) movement (c) light (d) sound
26. 26.Which of these is safe? (a) use a cable with cuts (b) use mains for a project (c) stay away from pylons (d) touch a switch when wet
27. 27.🔋 How many 3 V cells must be joined in series to give 6 V?
28. 28.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
29. 29.🔍 Which is the odd one out? (a) a safety pin (b) a copper wire (c) an iron nail (d) a cotton thread
30. 30.Which of these is an insulator? (a) a rubber eraser (b) a brass key (c) a graphite rod (d) an iron nail
31. 31.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
32. 32.What does a tilt switch do? (a) closes when tipped over (b) springs back when let go (c) closes near a magnet (d) slides side to side
33. 33.Which of these is safe? (a) poke things in a socket (b) throw cells in a fire (c) climb an electric pole (d) build with an adult near
34. 34.Which of these mainly gives out light? (a) an exhaust fan (b) a mixer grinder (c) a traffic signal (d) an electric iron
35. 35.🔍 Which is the odd one out? (a) a rubber band (b) a plastic ruler (c) a dry cork (d) a graphite rod
36. 36.Which drawing is the symbol for a switch? (a) a circle with M inside (b) a circle with a cross (c) one tall, one short bar (d) a line lifted at a gap
37. 37.🔍 Which is the odd one out? (a) throw cells in a fire (b) use mains for a project (c) poke things in a socket (d) build with an adult near
38. 38.True or false: a tilt switch works only while pressed. (a) False (b) True
39. 39.🔌 Is a paper strip a conductor or an insulator? (a) an insulator (b) a conductor
40. 40.🔍 Which is the odd one out? (a) a toaster (b) an electric kettle (c) an electric iron (d) a buzzer

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