Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 485 · 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.🔌 Is a paper strip a conductor or an insulator? (a) an insulator (b) a conductor
2. 2.💡 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) dimmer (c) brighter
3. 3.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) the same voltage (c) no voltage (d) half the voltage
4. 4.Which of these is true of a series circuit? (a) each gets the full volts (b) a single current path (c) one out, the rest glow (d) many paths for current
5. 5.💡 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
6. 6.⚡ What does a ceiling fan mainly change electricity into? (a) heat (b) movement (c) sound (d) light
7. 7.Which of these is an insulator? (a) a wooden stick (b) a steel coin (c) a steel spoon (d) a brass key
8. 8.⚠️ Why must we never touch switches with wet hands? (a) water carries current (b) it is just untidy (c) it spoils the paint (d) water makes it cold
9. 9.Which of these is true of a series circuit? (a) each gets the full volts (b) one out, the rest glow (c) one bulb out, all go out (d) own switch for each bulb
10. 10.🔘 Which kind of switch closes near a magnet? (a) a reed switch (b) a slide switch (c) a toggle switch (d) a push button
11. 11.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) by Wi-Fi (c) not joined (d) in parallel
12. 12.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
13. 13.⚠️ Is it safe to touch a switch when wet? (a) not safe (b) safe
14. 14.Which of these mainly makes movement? (a) a buzzer (b) an electric kettle (c) an exhaust fan (d) a street light
15. 15.Which of these means the circuit is open? (a) the loop is complete (b) the switch is ON (c) all wires are joined (d) a cell is taken out
16. 16.Which of these is true of a series circuit? (a) many paths for current (b) a break stops every bulb (c) own switch for each bulb (d) each gets the full volts
17. 17.💡 A battery lights 4 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
18. 18.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
19. 19.🔍 Which is the odd one out? (a) stop if a part gets hot (b) throw cells in a fire (c) stay away from pylons (d) use small battery cells
20. 20.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
21. 21.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
22. 22.True or false: triangle against a bar is the symbol for a diode. (a) False (b) True
23. 23.🔋 A 6 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
24. 24.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
25. 25.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
26. 26.⚠️ Is it safe to touch a fallen wire? (a) safe (b) not safe
27. 27.Which of these gives us electricity? (a) a television (b) a refrigerator (c) a power station (d) an air conditioner
28. 28.💡 5 identical bulbs are joined in series with a 7.5 V battery (ideal wires). How many volts does each bulb get? =
29. 29.Which of these mainly gives out light? (a) an electric kettle (b) an electric iron (c) a mixer grinder (d) a street light
30. 30.🔌 Is a cotton thread a conductor or an insulator? (a) an insulator (b) a conductor
31. 31.🔋 How many 2 V cells must be joined in series to give 14 V?
32. 32.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) straight lines (c) little stars (d) dotted circles
33. 33.Which of these gives us electricity? (a) a solar panel (b) an air conditioner (c) a refrigerator (d) a computer
34. 34.True or false: a circle with a cross is the symbol for a bulb. (a) False (b) True
35. 35.🔋 4 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)? =
36. 36.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a graphite rod across the gap. Does the bulb glow? (a) No (b) Yes
37. 37.🔋 A 6 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
38. 38.True or false: a metal paper clip is an insulator. (a) False (b) True
39. 39.🔁 What must there be for a current to flow? (a) one loose end (b) a complete loop (c) a plastic gap (d) a broken path
40. 40.True or false: a circle with M inside is the symbol for a motor. (a) True (b) False

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