Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 81 · 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.💡 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?
2. 2.🔗 Series or parallel circuit: “many paths for current”? (a) parallel (b) series
3. 3.True or false: a toaster mainly gives out light. (a) False (b) True
4. 4.What does a tilt switch do? (a) works only while pressed (b) closes when tipped over (c) closes near a magnet (d) springs back when let go
5. 5.True or false: triangle, bar and arrows is the symbol for a capacitor. (a) True (b) False
6. 6.🔋 A 12 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
7. 7.🔗 Series or parallel circuit: “used in house wiring”? (a) parallel (b) series
8. 8.🔍 Which is the odd one out? (a) fly kites in open fields (b) build with an adult near (c) use small battery cells (d) touch a fallen wire
9. 9.🔋 A 9 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
10. 10.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
11. 11.Which of these means the circuit is closed? (a) a wire has come loose (b) a cell is taken out (c) the loop is complete (d) a wire is cut
12. 12.🔌 Is a metal paper clip a conductor or an insulator? (a) a conductor (b) an insulator
13. 13.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
14. 14.Which of these is a conductor? (a) a plastic ruler (b) a ceramic cup (c) a paper strip (d) an iron nail
15. 15.True or false: triangle, bar and arrows is the symbol for an LED. (a) False (b) True
16. 16.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
17. 17.Which of these is true of a series circuit? (a) one out, the rest glow (b) many paths for current (c) bulbs share the voltage (d) each gets the full volts
18. 18.⚡ What does a school bell mainly change electricity into? (a) sound (b) heat (c) light (d) movement
19. 19.Which of these uses electricity? (a) a wind turbine (b) a battery (c) a bicycle dynamo (d) an air conditioner
20. 20.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
21. 21.True or false: an electric toy car mainly makes movement. (a) True (b) False
22. 22.⚠️ Who should be with you when you build a circuit? (a) a stranger online (b) a trusted adult (c) a younger child (d) nobody
23. 23.🔋 3 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
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) brighter (b) the same (c) dimmer
25. 25.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
26. 26.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to make bulbs dim (c) to save copper only (d) so all go off together
27. 27.True or false: a ceramic cup is a conductor. (a) True (b) False
28. 28.What does a reed switch do? (a) closes when tipped over (b) slides side to side (c) flips up or down (d) closes near a magnet
29. 29.Which of these is not safe? (a) stay away from pylons (b) use small battery cells (c) dry your hands first (d) open a phone charger
30. 30.Which of these gives us electricity? (a) a refrigerator (b) a computer (c) an air conditioner (d) a cell
31. 31.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is OFF. Does the bulb glow? (a) Yes (b) No
32. 32.🔘 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 OFF. Does the bulb glow? (a) No (b) Yes
33. 33.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
34. 34.Which of these is a conductor? (a) a cotton thread (b) a dry cork (c) a glass marble (d) a copper wire
35. 35.🔁 What must there be for a current to flow? (a) a broken path (b) one loose end (c) a complete loop (d) a plastic gap
36. 36.⚡ What does a toaster mainly change electricity into? (a) light (b) heat (c) movement (d) sound
37. 37.Which of these is an insulator? (a) a brass key (b) a safety pin (c) a glass marble (d) a copper wire
38. 38.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
39. 39.Which of these is not safe? (a) poke things in a socket (b) dry your hands first (c) stay away from pylons (d) fly kites in open fields
40. 40.Which of these is true of a series circuit? (a) one bulb out, all go out (b) many paths for current (c) one out, the rest glow (d) own switch for each bulb

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