Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 644 · 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.True or false: to use a cable with cuts is safe. (a) True (b) False
2. 2.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
3. 3.⚠️ Is it safe to use mains for a project? (a) not safe (b) safe
4. 4.🔋 How many 1.2 V cells must be joined in series to give 3.6 V?
5. 5.Which of these is safe? (a) poke things in a socket (b) throw cells in a fire (c) use small battery cells (d) touch a fallen wire
6. 6.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
7. 7.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. Does bulb 1 glow? (a) No (b) Yes
8. 8.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
9. 9.🔗 Series or parallel circuit: “one out, the rest glow”? (a) series (b) parallel
10. 10.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
11. 11.True or false: if the switch is ON, the circuit is closed and current flows. (a) False (b) True
12. 12.Which of these mainly makes movement? (a) a traffic signal (b) a room heater (c) a street light (d) a table fan
13. 13.True or false: to build with an adult near is safe. (a) True (b) False
14. 14.🔁 What must there be for a current to flow? (a) a complete loop (b) a plastic gap (c) a broken path (d) one loose end
15. 15.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) little stars (c) wavy lines (d) dotted circles
16. 16.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) capacitor (b) bulb (c) switch (d) voltmeter
17. 17.True or false: to keep drinks far away is safe. (a) False (b) True
18. 18.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
19. 19.True or false: to open a phone charger is not safe. (a) True (b) False
20. 20.🔍 Which is the odd one out? (a) an iron nail (b) a dry cork (c) a paper strip (d) a rubber band
21. 21.🔌 Is a wooden stick a conductor or an insulator? (a) an insulator (b) a conductor
22. 22.🔋 Does a solar panel give electricity or use electricity? (a) uses electricity (b) gives electricity
23. 23.🔘 Which kind of switch closes near a magnet? (a) a toggle switch (b) a reed switch (c) a tilt switch (d) a slide switch
24. 24.🔍 Which is the odd one out? (a) an electric toy car (b) a table fan (c) a mixer grinder (d) a night lamp
25. 25.🔍 Which is the odd one out? (a) a tube light (b) a mixer grinder (c) a night lamp (d) a street light
26. 26.Which of these is true of a parallel circuit? (a) used in house wiring (b) bulbs share the voltage (c) one bulb out, all go out (d) a break stops every bulb
27. 27.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
28. 28.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 2 glow? (a) No (b) Yes
29. 29.💡 4 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
30. 30.⚠️ Is it safe to open a phone charger? (a) safe (b) not safe
31. 31.💡 2 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
32. 32.Which of these gives us electricity? (a) an air conditioner (b) a television (c) a generator (d) a washing machine
33. 33.🔍 Which is the odd one out? (a) a cotton thread (b) a dry cork (c) a plastic ruler (d) a brass key
34. 34.Which of these is a conductor? (a) a ceramic cup (b) a plastic ruler (c) a safety pin (d) a cotton thread
35. 35.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
36. 36.🔘 A bulb and a cell are joined through 4 switches on 4 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
37. 37.💡 In a series circuit, how many paths does the current have? (a) one (b) none (c) one for each bulb (d) two
38. 38.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) symbols are heavier (c) to hide the circuit (d) quick and clear for all
39. 39.🔋 Does a cell give electricity or use electricity? (a) gives electricity (b) uses electricity
40. 40.🔦 A circuit has a used-up (dead) 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 glass marble. Does the bulb glow? (a) Yes (b) No

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