Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 492 · 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 kind of switch flips up or down? (a) a toggle switch (b) a tilt switch (c) a push button (d) a slide switch
2. 2.⚡ What do we call a flow of electric charge through a wire? (a) sound (b) electric current (c) friction (d) a magnet
3. 3.🔘 Which kind of switch closes near a magnet? (a) a reed switch (b) a push button (c) a tilt switch (d) a toggle switch
4. 4.Which of these mainly gives out light? (a) a tube light (b) a rice cooker (c) a ceiling fan (d) a water heater
5. 5.💡 2 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
6. 6.💡 5 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
7. 7.True or false: a loudspeaker mainly gives out light. (a) True (b) False
8. 8.Which of these is safe? (a) use a cable with cuts (b) throw cells in a fire (c) climb an electric pole (d) dry your hands first
9. 9.Which of these is an insulator? (a) an iron nail (b) a woollen thread (c) a graphite rod (d) a metal paper clip
10. 10.True or false: a water heater mainly gives out heat. (a) False (b) True
11. 11.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 3 of the switches are OFF and the rest are ON. How many bulbs glow?
12. 12.💡 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
13. 13.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the longer line (c) the shorter line (d) both lines
14. 14.True or false: a plastic ruler is a conductor. (a) True (b) False
15. 15.💡 In a series circuit, how many paths does the current have? (a) two (b) one for each bulb (c) none (d) one
16. 16.💡 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
17. 17.💡 3 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?
18. 18.⚠️ Is it safe to use mains for a project? (a) not safe (b) safe
19. 19.🔋 What is a battery? (a) one single wire (b) a switch with a lid (c) two or more cells joined (d) a kind of bulb
20. 20.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
21. 21.What does a slide switch do? (a) stays where you flip it (b) slides side to side (c) closes when tipped over (d) works only while pressed
22. 22.True or false: a small empty box is the symbol for a resistor. (a) True (b) False
23. 23.🔌 Most metals are good … (a) magnets only (b) batteries (c) conductors (d) insulators
24. 24.⚠️ Who should be with you when you build a circuit? (a) nobody (b) a younger child (c) a trusted adult (d) a stranger online
25. 25.🔋 3 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
26. 26.🔌 Is an iron nail a conductor or an insulator? (a) a conductor (b) an insulator
27. 27.🔌 Which metal is used for most electric wires at home? (a) rubber (b) plastic (c) glass (d) copper
28. 28.💡 2 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
29. 29.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one bulb out, all go out (c) own switch for each bulb (d) a single current path
30. 30.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the switch (c) the filament (d) the base
31. 31.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
32. 32.Which of these is true of a series circuit? (a) each gets the full volts (b) used in house wiring (c) bulbs share the voltage (d) one out, the rest glow
33. 33.⚠️ Is it safe to climb an electric pole? (a) safe (b) not safe
34. 34.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 0.5 V (c) 15 V (d) 1.5 V
35. 35.Which drawing is the symbol for an LED? (a) a long and a short line (b) many long-short pairs (c) a circle with an X in it (d) triangle, bar and arrows
36. 36.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) closed (b) open
37. 37.🔌 Which part of a screwdriver should an electrician hold? (a) the plastic handle (b) the bare end (c) the metal tip (d) the steel shaft
38. 38.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) sound energy (b) movement energy (c) light energy (d) chemical energy
39. 39.True or false: an electric drill mainly makes movement. (a) False (b) True
40. 40.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) a switch that is ON (c) an insulator (d) a cell

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