Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 117 · 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 push button (b) a tilt switch (c) a toggle switch (d) a reed switch
2. 2.🔌 Is aluminium foil a conductor or an insulator? (a) a conductor (b) an insulator
3. 3.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) little stars (c) dotted circles (d) wavy lines
4. 4.True or false: triangle against a bar is the symbol for a motor. (a) False (b) True
5. 5.⚡ What does an LED lamp mainly change electricity into? (a) heat (b) sound (c) light (d) movement
6. 6.🔌 Is a glass marble a conductor or an insulator? (a) an insulator (b) a conductor
7. 7.🔘 Which kind of switch slides side to side? (a) a tilt switch (b) a slide switch (c) a reed switch (d) a push button
8. 8.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
9. 9.🔘 Which kind of switch closes near a magnet? (a) a reed switch (b) a tilt switch (c) a toggle switch (d) a push button
10. 10.Which of these is true of a series circuit? (a) own switch for each bulb (b) one bulb out, all go out (c) many paths for current (d) one out, the rest glow
11. 11.True or false: a buzzer mainly makes sound. (a) True (b) False
12. 12.💡 4 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. Bulb 3 is taken out of its holder. How many bulbs glow?
13. 13.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
14. 14.🔌 Is a steel coin a conductor or an insulator? (a) a conductor (b) an insulator
15. 15.Which of these is an insulator? (a) a metal paper clip (b) a brass key (c) a glass marble (d) a steel spoon
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.Which drawing is the symbol for a junction? (a) a plain rectangle (b) a dot where wires meet (c) a line lifted at a gap (d) one tall, one short bar
18. 18.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
19. 19.🔋 Cells joined + to − in a row (series) give … (a) a bigger voltage (b) the same voltage (c) a smaller voltage (d) no voltage
20. 20.🔍 Which is the odd one out? (a) a safety pin (b) a copper wire (c) a plastic straw (d) aluminium foil
21. 21.True or false: to build with an adult near is safe. (a) True (b) False
22. 22.🔘 Two switches are in series. When does the bulb glow? (a) when either is ON (b) never (c) when both are ON (d) when both are OFF
23. 23.Which of these means the circuit is open? (a) the bulb is unscrewed (b) the loop is complete (c) the switch is ON (d) all wires are joined
24. 24.💡 2 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
25. 25.🔋 2 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.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
27. 27.True or false: to climb an electric pole is safe. (a) True (b) False
28. 28.🔍 Which is the odd one out? (a) a plastic ruler (b) a brass key (c) a safety pin (d) a metal paper clip
29. 29.True or false: “a single current path” is true of a series circuit. (a) True (b) False
30. 30.What does a toggle switch do? (a) stays where you flip it (b) works only while pressed (c) closes near a magnet (d) springs back when let go
31. 31.⚡ What does a street light mainly change electricity into? (a) sound (b) heat (c) movement (d) light
32. 32.True or false: a wooden stick is a conductor. (a) False (b) True
33. 33.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
34. 34.True or false: to dry your hands first is not safe. (a) False (b) True
35. 35.Which of these is true of a parallel circuit? (a) a single current path (b) bulbs share the voltage (c) a break stops every bulb (d) each gets the full volts
36. 36.🔘 When a switch is ON, the circuit is … (a) cut (b) closed (c) open (d) broken
37. 37.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a paper strip across the gap. Does the bulb glow? (a) Yes (b) No
38. 38.True or false: if all wires are joined, the circuit is closed and current flows. (a) False (b) True
39. 39.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
40. 40.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they all go out (c) they explode (d) they get dimmer

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