Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 875 · 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.🔘 What does a switch do in a circuit? (a) makes electricity (b) opens or closes the loop (c) changes the voltage (d) stores current
2. 2.🔍 Which is the odd one out? (a) use mains for a project (b) throw cells in a fire (c) use small battery cells (d) touch a fallen wire
3. 3.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
4. 4.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
5. 5.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) switch (b) capacitor (c) resistor (d) LED
6. 6.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
7. 7.True or false: if the switch is ON, the circuit is open and no current flows. (a) True (b) False
8. 8.Which of these is true of a series circuit? (a) own switch for each bulb (b) each gets the full volts (c) used in house wiring (d) one bulb out, all go out
9. 9.🔋 Identical cells side by side (in parallel) give … (a) the same voltage (b) double the voltage (c) no voltage (d) half the voltage
10. 10.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put an iron nail across the gap. Does the bulb glow? (a) No (b) Yes
11. 11.💡 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
12. 12.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
13. 13.💡 3 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
14. 14.🔋 Does a computer give electricity or use electricity? (a) uses electricity (b) gives electricity
15. 15.What does a push button do? (a) slides side to side (b) closes when tipped over (c) springs back when let go (d) closes near a magnet
16. 16.Which of these is true of a parallel circuit? (a) used in house wiring (b) a break stops every bulb (c) a single current path (d) one bulb out, all go out
17. 17.🔋 2 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
18. 18.🔌 Is a paper strip a conductor or an insulator? (a) an insulator (b) a conductor
19. 19.💡 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?
20. 20.💡 In a series circuit, how many paths does the current have? (a) one (b) two (c) none (d) one for each bulb
21. 21.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) bulbs share the voltage (c) a single current path (d) each gets the full volts
22. 22.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one out, the rest glow (c) a single current path (d) one bulb out, all go out
23. 23.⚠️ Which power source should children use for electronics projects? (a) a mains extension board (b) an inverter socket (c) a wall socket (d) a small battery pack
24. 24.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
25. 25.True or false: a circle with M inside is the symbol for a capacitor. (a) False (b) True
26. 26.True or false: a copper wire is an insulator. (a) False (b) True
27. 27.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) battery (b) cell (c) junction (d) capacitor
28. 28.⚡ Which tiny particles drift along a metal wire to carry the current? (a) electrons (b) dust particles (c) photons (d) water drops
29. 29.True or false: a wooden stick is an insulator. (a) False (b) True
30. 30.🔘 Which kind of switch works only while pressed? (a) a slide switch (b) a tilt switch (c) a push button (d) a reed switch
31. 31.🔘 Two switches are in series. When does the bulb glow? (a) never (b) when both are OFF (c) when both are ON (d) when either is ON
32. 32.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a steel coin. Does the bulb glow? (a) No (b) Yes
33. 33.🔋 3 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
34. 34.🔘 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 ON. Does the bulb glow? (a) No (b) Yes
35. 35.True or false: to keep drinks far away is safe. (a) False (b) True
36. 36.🔋 4 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
37. 37.🔋 8 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
38. 38.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
39. 39.💡 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) dimmer (c) the same
40. 40.Which of these means the circuit is open? (a) the loop is complete (b) all wires are joined (c) the switch is ON (d) the switch is OFF

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