Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 814 · 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 mainly gives out light? (a) a tube light (b) a ceiling fan (c) an electric drill (d) a doorbell
2. 2.What does a toggle switch do? (a) springs back when let go (b) closes when tipped over (c) works only while pressed (d) stays where you flip it
3. 3.💡 3 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
4. 4.🔍 Which is the odd one out? (a) a siren (b) a traffic signal (c) a tube light (d) a torch
5. 5.Which of these is a conductor? (a) a steel spoon (b) a rubber eraser (c) a woollen thread (d) a paper strip
6. 6.True or false: a toggle switch stays where you flip it. (a) True (b) False
7. 7.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) False (b) True
8. 8.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) an open circuit (c) a series circuit (d) a full circuit
9. 9.True or false: a long and a short line is the symbol for a cell. (a) False (b) True
10. 10.💡 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. How many bulbs glow?
11. 11.Which of these mainly gives out heat? (a) a night lamp (b) a siren (c) an electric kettle (d) an electric drill
12. 12.What does a reed switch do? (a) closes near a magnet (b) flips up or down (c) works only while pressed (d) slides side to side
13. 13.Which of these uses electricity? (a) a power station (b) a refrigerator (c) a cell (d) a solar panel
14. 14.True or false: a circle with a cross is the symbol for a voltmeter. (a) False (b) True
15. 15.True or false: a ceiling fan mainly gives out light. (a) False (b) True
16. 16.True or false: a reed switch closes near a magnet. (a) True (b) False
17. 17.🔌 Is an iron nail a conductor or an insulator? (a) a conductor (b) an insulator
18. 18.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) each gets full voltage (c) to save copper only (d) so all go off together
19. 19.🔦 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) Yes (b) No
20. 20.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) light energy (b) sound energy (c) chemical energy (d) movement energy
21. 21.Which of these mainly gives out light? (a) a ceiling fan (b) a rice cooker (c) a torch (d) a toaster
22. 22.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) Yes (b) No
23. 23.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) cell (b) LED (c) switch (d) bulb
24. 24.💡 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) brighter (c) dimmer
25. 25.🔘 When a switch is ON, the circuit is … (a) broken (b) open (c) closed (d) cut
26. 26.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
27. 27.⚡ What does a mixer grinder mainly change electricity into? (a) movement (b) heat (c) light (d) sound
28. 28.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) not joined (c) by Wi-Fi (d) in series
29. 29.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) only one (c) both of them (d) it does not matter
30. 30.⚠️ Who should be with you when you build a circuit? (a) a younger child (b) nobody (c) a stranger online (d) a trusted adult
31. 31.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
32. 32.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
33. 33.💡 2 identical bulbs are joined in series with an 8 V battery (ideal wires). How many volts does each bulb get? =
34. 34.Which of these is not safe? (a) throw cells in a fire (b) stay away from pylons (c) build with an adult near (d) keep drinks far away
35. 35.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a break stops every bulb (c) a single current path (d) each gets the full volts
36. 36.🔋 8 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
37. 37.💡 In a series circuit, how many paths does the current have? (a) none (b) two (c) one (d) one for each bulb
38. 38.🔘 Which kind of switch slides side to side? (a) a push button (b) a slide switch (c) a toggle switch (d) a reed switch
39. 39.True or false: a circle with an X in it is the symbol for a voltmeter. (a) False (b) True
40. 40.True or false: a tube light mainly gives out light. (a) False (b) True

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