Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 789 · 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 cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is ON, B is ON, C is ON and D is OFF. Does the bulb glow? (a) Yes (b) No
2. 2.🔘 Which kind of switch closes near a magnet? (a) a toggle switch (b) a reed switch (c) a tilt switch (d) a push button
3. 3.Which of these is true of a series circuit? (a) each gets the full volts (b) used in house wiring (c) one out, the rest glow (d) bulbs share the voltage
4. 4.🔘 Which kind of switch flips up or down? (a) a toggle switch (b) a slide switch (c) a tilt switch (d) a push button
5. 5.🔁 What must there be for a current to flow? (a) a plastic gap (b) a complete loop (c) one loose end (d) a broken path
6. 6.🔋 A 9 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
7. 7.⚠️ Why must we never touch switches with wet hands? (a) it spoils the paint (b) water makes it cold (c) water carries current (d) it is just untidy
8. 8.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) not joined (c) in series (d) by Wi-Fi
9. 9.🔋 Does a water pump give electricity or use electricity? (a) uses electricity (b) gives electricity
10. 10.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 230 V (c) 1.5 V (d) 15 V
11. 11.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
12. 12.Which of these means the circuit is open? (a) the loop is complete (b) the switch is ON (c) all wires are joined (d) the bulb is unscrewed
13. 13.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
14. 14.🔌 Is a steel coin a conductor or an insulator? (a) an insulator (b) a conductor
15. 15.Which of these is not safe? (a) use small battery cells (b) open a phone charger (c) stop if a part gets hot (d) fly kites in open fields
16. 16.💡 A battery lights 2 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
17. 17.🔋 Does a generator give electricity or use electricity? (a) gives electricity (b) uses electricity
18. 18.True or false: a circle with A inside is the symbol for an ammeter. (a) False (b) True
19. 19.True or false: if the loop is complete, the circuit is closed and current flows. (a) True (b) False
20. 20.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. Does bulb 1 glow? (a) Yes (b) No
21. 21.🔘 When a switch is ON, the circuit is … (a) open (b) broken (c) cut (d) closed
22. 22.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
23. 23.🔌 A gap of dry air between two wires acts as … (a) a cell (b) a switch that is ON (c) a conductor (d) an insulator
24. 24.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are ON (b) never (c) only when both are OFF (d) when either is ON
25. 25.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they keep glowing (c) they explode (d) they all go out
26. 26.🔗 Series or parallel circuit: “each gets the full volts”? (a) parallel (b) series
27. 27.🔍 Which is the odd one out? (a) stay away from pylons (b) climb an electric pole (c) use small battery cells (d) keep drinks far away
28. 28.Which drawing is the symbol for a motor? (a) a circle with A inside (b) triangle against a bar (c) a circle with M inside (d) a long and a short line
29. 29.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a small battery pack (c) a wall socket (d) a mains extension board
30. 30.💡 2 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. All the bulbs are in place. How many bulbs glow?
31. 31.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. How many bulbs glow?
32. 32.Which of these mainly gives out light? (a) an electric drill (b) an exhaust fan (c) a night lamp (d) a mixer grinder
33. 33.True or false: an electric toy car mainly makes sound. (a) True (b) False
34. 34.🔌 Is a plastic straw a conductor or an insulator? (a) an insulator (b) a conductor
35. 35.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
36. 36.🔁 Is the circuit closed or open if a wire has come loose? (a) open (b) closed
37. 37.💡 Why is house wiring done in parallel? (a) so all go off together (b) each gets full voltage (c) to make bulbs dim (d) to save copper only
38. 38.What does a toggle switch do? (a) stays where you flip it (b) springs back when let go (c) slides side to side (d) works only while pressed
39. 39.🔘 What does a switch do in a circuit? (a) opens or closes the loop (b) changes the voltage (c) makes electricity (d) stores current
40. 40.True or false: triangle, bar and arrows is the symbol for a motor. (a) True (b) False

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