Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 143 · 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.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) by Wi-Fi (c) not joined (d) in series
2. 2.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) never (b) when either is ON (c) only when both are OFF (d) only when both are ON
3. 3.🔦 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
4. 4.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
5. 5.True or false: a night lamp mainly gives out light. (a) True (b) False
6. 6.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
7. 7.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 5 is taken out of its holder. Does bulb 4 glow? (a) Yes (b) No
8. 8.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) wait and watch (b) pour water on them (c) shout for an adult (d) pull them by the hand
9. 9.Which of these is an insulator? (a) aluminium foil (b) a rubber eraser (c) an iron nail (d) a steel coin
10. 10.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the longer line (c) both lines (d) the shorter line
11. 11.⚠️ About how many volts do home sockets in India supply? (a) 9 V (b) 12 V (c) 230 V (d) 1.5 V
12. 12.🔍 Which is the odd one out? (a) touch a switch when wet (b) stop if a part gets hot (c) use a cable with cuts (d) use mains for a project
13. 13.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
14. 14.🔍 Which is the odd one out? (a) a school bell (b) an electric kettle (c) a rice cooker (d) a toaster
15. 15.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) capacitor (b) junction (c) ammeter (d) cell
16. 16.⚠️ Is it safe to take cells out after use? (a) safe (b) not safe
17. 17.🔋 What is a battery? (a) a kind of bulb (b) two or more cells joined (c) a switch with a lid (d) one single wire
18. 18.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
19. 19.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
20. 20.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
21. 21.True or false: a loudspeaker mainly gives out light. (a) True (b) False
22. 22.🔘 What does a switch do in a circuit? (a) stores current (b) changes the voltage (c) opens or closes the loop (d) makes electricity
23. 23.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. Does bulb 2 glow? (a) Yes (b) No
24. 24.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) little stars (c) straight lines (d) dotted circles
25. 25.🔋 How many 1.2 V cells must be joined in series to give 9.6 V?
26. 26.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) quick and clear for all (c) to make it colourful (d) symbols are heavier
27. 27.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is OFF and B is ON. Does the bulb glow? (a) No (b) Yes
28. 28.💡 Why is house wiring done in parallel? (a) to save copper only (b) each gets full voltage (c) so all go off together (d) to make bulbs dim
29. 29.True or false: if a cell is taken out, the circuit is open and no current flows. (a) False (b) True
30. 30.Which of these mainly gives out light? (a) a school bell (b) a street light (c) a rice cooker (d) a buzzer
31. 31.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
32. 32.💡 3 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
33. 33.🔦 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 a steel spoon. Does the bulb glow? (a) Yes (b) No
34. 34.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) plastic is a conductor (c) to make them heavy (d) plastic is an insulator
35. 35.Which of these is true of a series circuit? (a) own switch for each bulb (b) used in house wiring (c) many paths for current (d) a single current path
36. 36.Which of these is true of a series circuit? (a) one bulb out, all go out (b) used in house wiring (c) own switch for each bulb (d) many paths for current
37. 37.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
38. 38.🔘 Which kind of switch springs back when let go? (a) a reed switch (b) a push button (c) a tilt switch (d) a slide switch
39. 39.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) closed (b) open
40. 40.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open

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