Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 163 · 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.🔦 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 paper strip. Does the bulb glow? (a) Yes (b) No
2. 2.✏️ Why do engineers draw circuits with symbols? (a) quick and clear for all (b) to make it colourful (c) symbols are heavier (d) to hide the circuit
3. 3.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) so all go off together (c) each gets full voltage (d) to save copper only
4. 4.Which of these gives us electricity? (a) a refrigerator (b) a television (c) a generator (d) a computer
5. 5.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a wooden stick across the gap. Does the bulb glow? (a) Yes (b) No
6. 6.True or false: a small empty box is the symbol for a resistor. (a) True (b) False
7. 7.Which drawing is the symbol for a junction? (a) a small empty box (b) two or more cell symbols (c) a dot where wires meet (d) a long and a short line
8. 8.🔌 A gap of dry air between two wires acts as … (a) a switch that is ON (b) a cell (c) a conductor (d) an insulator
9. 9.True or false: a slide switch closes when tipped over. (a) True (b) False
10. 10.🔘 When a switch is ON, the circuit is … (a) open (b) broken (c) closed (d) cut
11. 11.⚡ A fan changes electrical energy mainly into which kind of energy? (a) movement energy (b) light energy (c) sound energy (d) chemical energy
12. 12.🔍 Which is the odd one out? (a) an exhaust fan (b) a table fan (c) a doorbell (d) a mixer grinder
13. 13.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
14. 14.True or false: to build with an adult near is not safe. (a) True (b) False
15. 15.💡 3 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
16. 16.🔋 How many volts does one ordinary torch cell give? (a) 1.5 V (b) 230 V (c) 15 V (d) 0.5 V
17. 17.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
18. 18.True or false: if the bulb is unscrewed, the circuit is closed and current flows. (a) True (b) False
19. 19.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the longer line (c) both lines (d) the shorter line
20. 20.🔋 Identical cells side by side (in parallel) give … (a) no voltage (b) the same voltage (c) double the voltage (d) half the voltage
21. 21.🔌 Why are electric wires covered in plastic? (a) plastic is an insulator (b) to make them heavy (c) plastic makes current (d) plastic is a conductor
22. 22.💡 3 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. Bulbs 2 and 3 are taken out of their holders. How many bulbs glow?
23. 23.🔦 A circuit has a used-up (dead) 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 brass key. Does the bulb glow? (a) No (b) Yes
24. 24.🔘 Which kind of switch slides side to side? (a) a slide switch (b) a reed switch (c) a push button (d) a toggle switch
25. 25.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
26. 26.🔋 A 9 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
27. 27.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the switch (b) the filament (c) the base (d) the glass
28. 28.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
29. 29.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are ON (b) only when both are OFF (c) never (d) when either is ON
30. 30.🔌 Which metal is used for most electric wires at home? (a) rubber (b) glass (c) copper (d) plastic
31. 31.True or false: a circle with V inside is the symbol for a resistor. (a) False (b) True
32. 32.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
33. 33.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True
34. 34.Which of these uses electricity? (a) a solar panel (b) a generator (c) a wind turbine (d) a computer
35. 35.What does a push button do? (a) works only while pressed (b) flips up or down (c) closes near a magnet (d) slides side to side
36. 36.⚡ What does a street light mainly change electricity into? (a) light (b) movement (c) sound (d) heat
37. 37.True or false: a room heater mainly makes movement. (a) True (b) False
38. 38.Which of these is an insulator? (a) a glass marble (b) a safety pin (c) a steel coin (d) a steel spoon
39. 39.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pour water on them (b) wait and watch (c) pull them by the hand (d) shout for an adult
40. 40.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?

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