Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 11 · 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.True or false: a traffic signal mainly gives out light. (a) True (b) False
2. 2.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
3. 3.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
4. 4.True or false: an iron nail is a conductor. (a) True (b) False
5. 5.⚠️ Why must we never touch switches with wet hands? (a) water carries current (b) water makes it cold (c) it spoils the paint (d) it is just untidy
6. 6.🔍 Which is the odd one out? (a) an iron nail (b) a brass key (c) a woollen thread (d) a safety pin
7. 7.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) wavy lines (c) straight lines (d) dotted circles
8. 8.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
9. 9.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) symbols are heavier (c) to hide the circuit (d) quick and clear for all
10. 10.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) a full circuit (c) a series circuit (d) an open circuit
11. 11.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a fuse or MCB (b) a long wire (c) a bulb (d) a plug top
12. 12.Which of these is an insulator? (a) a safety pin (b) an iron nail (c) a dry cork (d) a copper wire
13. 13.💡 In a series circuit, how many paths does the current have? (a) two (b) one for each bulb (c) none (d) one
14. 14.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
15. 15.True or false: a slide switch slides side to side. (a) True (b) False
16. 16.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 4 glow? (a) No (b) Yes
17. 17.Which of these is not safe? (a) stop if a part gets hot (b) use small battery cells (c) poke things in a socket (d) build with an adult near
18. 18.Which of these is safe? (a) use mains for a project (b) touch a fallen wire (c) poke things in a socket (d) build with an adult near
19. 19.🔍 Which is the odd one out? (a) stay away from pylons (b) stop if a part gets hot (c) dry your hands first (d) open a phone charger
20. 20.Which of these is a conductor? (a) a wooden stick (b) a paper strip (c) a cotton thread (d) a brass key
21. 21.🔋 What is a battery? (a) two or more cells joined (b) one single wire (c) a switch with a lid (d) a kind of bulb
22. 22.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
23. 23.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
24. 24.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) voltmeter (b) switch (c) bulb (d) diode
25. 25.🔋 Does a bicycle dynamo give electricity or use electricity? (a) uses electricity (b) gives electricity
26. 26.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) cell (b) bulb (c) LED (d) motor
27. 27.True or false: a toggle switch stays where you flip it. (a) True (b) False
28. 28.🔗 Series or parallel circuit: “each gets the full volts”? (a) series (b) parallel
29. 29.🔋 6 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
30. 30.🔗 Series or parallel circuit: “one out, the rest glow”? (a) series (b) parallel
31. 31.True or false: if a wire is cut, the circuit is closed and current flows. (a) False (b) True
32. 32.True or false: triangle against a bar is the symbol for a cell. (a) True (b) False
33. 33.Which of these gives us electricity? (a) a computer (b) a water pump (c) a cell (d) an air conditioner
34. 34.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
35. 35.True or false: to keep drinks far away is not safe. (a) True (b) False
36. 36.True or false: a circle with a cross is the symbol for a bulb. (a) False (b) True
37. 37.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) battery (b) ammeter (c) wire (d) junction
38. 38.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) True (b) False
39. 39.💡 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
40. 40.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 15 V (c) 230 V (d) 1.5 V

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