Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 836 · 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.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to save copper only (c) to make bulbs dim (d) so all go off together
2. 2.True or false: a mixer grinder mainly gives out heat. (a) True (b) False
3. 3.⚡ Which tiny particles drift along a metal wire to carry the current? (a) water drops (b) electrons (c) dust particles (d) photons
4. 4.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) never (b) only when both are OFF (c) when either is ON (d) only when both are ON
5. 5.⚡ What do we call a flow of electric charge through a wire? (a) electric current (b) friction (c) a magnet (d) sound
6. 6.⚡ A solar panel changes which kind of energy into electricity? (a) chemical energy (b) light energy (c) sound energy (d) wind energy
7. 7.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
8. 8.🔘 A cell and a bulb are joined to 4 side-by-side paths with one switch on each path — A, B, C and D (parallel). A is OFF, B is OFF, C is OFF and D is ON. Does the bulb glow? (a) No (b) Yes
9. 9.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) both lines (c) neither line (d) the shorter line
10. 10.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) to make it colourful (c) quick and clear for all (d) symbols are heavier
11. 11.Which of these is an insulator? (a) a steel spoon (b) aluminium foil (c) a brass key (d) a paper strip
12. 12.True or false: a slide switch springs back when let go. (a) False (b) True
13. 13.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
14. 14.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) dotted circles (c) straight lines (d) wavy lines
15. 15.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
16. 16.⚡ A fan changes electrical energy mainly into which kind of energy? (a) chemical energy (b) light energy (c) movement energy (d) sound energy
17. 17.⚡ What does an electric kettle mainly change electricity into? (a) movement (b) light (c) sound (d) heat
18. 18.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
19. 19.🔌 Which metal is used for most electric wires at home? (a) plastic (b) glass (c) rubber (d) copper
20. 20.🔋 Cells joined + to − in a row (series) give … (a) a bigger voltage (b) no voltage (c) a smaller voltage (d) the same voltage
21. 21.💡 5 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
22. 22.What does a toggle switch do? (a) slides side to side (b) closes near a magnet (c) stays where you flip it (d) works only while pressed
23. 23.🔁 Is the circuit closed or open if a cell is taken out? (a) open (b) closed
24. 24.🔋 3 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
25. 25.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is OFF, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
26. 26.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) bulbs share the voltage (c) one bulb out, all go out (d) many paths for current
27. 27.Which drawing is the symbol for a voltmeter? (a) triangle, bar and arrows (b) a circle with V inside (c) a circle with A inside (d) two equal parallel lines
28. 28.💡 5 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
29. 29.🔘 Which kind of switch stays where you flip it? (a) a toggle switch (b) a push button (c) a slide switch (d) a reed switch
30. 30.💡 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) dimmer (c) brighter
31. 31.🔋 A 6 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
32. 32.🔋 How many volts does one ordinary torch cell give? (a) 1.5 V (b) 15 V (c) 0.5 V (d) 230 V
33. 33.⚡ What does a torch mainly change electricity into? (a) sound (b) movement (c) light (d) heat
34. 34.🔌 Is a steel coin a conductor or an insulator? (a) an insulator (b) a conductor
35. 35.🔘 When a switch is ON, the circuit is … (a) open (b) closed (c) broken (d) cut
36. 36.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
37. 37.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
38. 38.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) switch (b) wire (c) bulb (d) voltmeter
39. 39.Which of these mainly makes sound? (a) a street light (b) a toaster (c) a school bell (d) an electric kettle
40. 40.True or false: to open a phone charger is safe. (a) False (b) True

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