Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 484 · 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.Which of these is an insulator? (a) a brass key (b) a dry cork (c) a steel coin (d) aluminium foil
2. 2.⚠️ Is it safe to use a cable with cuts? (a) not safe (b) safe
3. 3.Which of these is not safe? (a) take cells out after use (b) use mains for a project (c) build with an adult near (d) dry your hands first
4. 4.Which of these mainly gives out light? (a) a school bell (b) a doorbell (c) an LED lamp (d) an electric toy car
5. 5.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
6. 6.True or false: a wooden stick is a conductor. (a) True (b) False
7. 7.🔋 6 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
8. 8.True or false: two equal parallel lines is the symbol for an LED. (a) False (b) True
9. 9.True or false: a school bell mainly makes sound. (a) True (b) False
10. 10.What does a push button do? (a) springs back when let go (b) stays where you flip it (c) flips up or down (d) closes near a magnet
11. 11.⚠️ Who should be with you when you build a circuit? (a) a younger child (b) a trusted adult (c) nobody (d) a stranger online
12. 12.💡 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
13. 13.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
14. 14.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is OFF, B is OFF, C is ON and D is ON. Does the bulb glow? (a) No (b) Yes
15. 15.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
16. 16.🔍 Which is the odd one out? (a) a paper strip (b) a copper wire (c) an iron nail (d) aluminium foil
17. 17.Which drawing is the symbol for a resistor? (a) a plain rectangle (b) triangle against a bar (c) two or more cell symbols (d) a circle with A inside
18. 18.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by an iron nail. Does the bulb glow? (a) No (b) Yes
19. 19.🔘 What does a switch do in a circuit? (a) makes electricity (b) opens or closes the loop (c) stores current (d) changes the voltage
20. 20.🔗 Series or parallel circuit: “each gets the full volts”? (a) series (b) parallel
21. 21.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) wire (b) motor (c) voltmeter (d) switch
22. 22.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
23. 23.Which of these is true of a parallel circuit? (a) one out, the rest glow (b) a break stops every bulb (c) bulbs share the voltage (d) a single current path
24. 24.🔋 A 12 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
25. 25.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) so all go off together (c) to save copper only (d) to make bulbs dim
26. 26.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) straight lines (c) little stars (d) dotted circles
27. 27.True or false: a tilt switch closes near a magnet. (a) False (b) True
28. 28.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) both lines (c) neither line (d) the shorter line
29. 29.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
30. 30.🔋 How many 3 V cells must be joined in series to give 9 V?
31. 31.🔋 Does a solar panel give electricity or use electricity? (a) uses electricity (b) gives electricity
32. 32.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they keep glowing (c) they get dimmer (d) they explode
33. 33.Which of these means the circuit is closed? (a) a wire has come loose (b) the bulb is unscrewed (c) a cell is taken out (d) the switch is ON
34. 34.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
35. 35.💡 3 identical bulbs are joined in series with a 12 V battery (ideal wires). How many volts does each bulb get? =
36. 36.Which of these is a conductor? (a) a ceramic cup (b) a steel spoon (c) a paper strip (d) a plastic straw
37. 37.⚡ A cell changes stored chemical energy into which kind of energy? (a) nuclear energy (b) wind energy (c) electrical energy (d) sound energy
38. 38.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
39. 39.True or false: a slide switch closes near a magnet. (a) True (b) False
40. 40.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel

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