Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 568 · 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: a dot where wires meet is the symbol for a junction. (a) False (b) True
2. 2.🔦 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
3. 3.💡 4 identical bulbs are joined in series with an 8 V battery (ideal wires). How many volts does each bulb get? =
4. 4.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) ammeter (b) motor (c) cell (d) battery
5. 5.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) wire (b) cell (c) switch (d) battery
6. 6.True or false: to touch a switch when wet is not safe. (a) True (b) False
7. 7.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
8. 8.🔍 Which is the odd one out? (a) a toaster (b) a traffic signal (c) a night lamp (d) a torch
9. 9.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
10. 10.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a brass key. Does the bulb glow? (a) Yes (b) No
11. 11.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
12. 12.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
13. 13.🔘 When a switch is ON, the circuit is … (a) open (b) cut (c) broken (d) closed
14. 14.⚡ What does an electric iron mainly change electricity into? (a) heat (b) light (c) sound (d) movement
15. 15.🔦 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 woollen thread. Does the bulb glow? (a) No (b) Yes
16. 16.True or false: a slide switch slides side to side. (a) False (b) True
17. 17.🔍 Which is the odd one out? (a) touch a fallen wire (b) poke things in a socket (c) touch a switch when wet (d) stay away from pylons
18. 18.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
19. 19.⚠️ Is it safe to poke things in a socket? (a) not safe (b) safe
20. 20.🔍 Which is the odd one out? (a) stop if a part gets hot (b) take cells out after use (c) fly kites in open fields (d) climb an electric pole
21. 21.💡 5 identical bulbs are joined in series with a 15 V battery (ideal wires). How many volts does each bulb get? =
22. 22.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. How many bulbs glow?
23. 23.True or false: “a single current path” is true of a series circuit. (a) False (b) True
24. 24.💡 A battery lights 4 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.🔍 Which is the odd one out? (a) a woollen thread (b) a copper wire (c) a brass key (d) a metal paper clip
26. 26.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
27. 27.💡 2 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
28. 28.Which of these is a conductor? (a) a woollen thread (b) a cotton thread (c) a steel coin (d) a plastic ruler
29. 29.Which of these mainly makes movement? (a) an LED lamp (b) a rice cooker (c) a siren (d) an exhaust fan
30. 30.Which of these gives us electricity? (a) a water pump (b) a television (c) a refrigerator (d) a generator
31. 31.True or false: a tilt switch stays where you flip it. (a) False (b) True
32. 32.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a dry cork across the gap. Does the bulb glow? (a) No (b) Yes
33. 33.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
34. 34.What does a toggle switch do? (a) springs back when let go (b) works only while pressed (c) slides side to side (d) stays where you flip it
35. 35.🔘 Which kind of switch stays where you flip it? (a) a slide switch (b) a reed switch (c) a toggle switch (d) a push button
36. 36.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to make bulbs dim (c) so all go off together (d) to save copper only
37. 37.🔌 Which part of a screwdriver should an electrician hold? (a) the steel shaft (b) the bare end (c) the metal tip (d) the plastic handle
38. 38.⚡ Which tiny particles drift along a metal wire to carry the current? (a) water drops (b) photons (c) dust particles (d) electrons
39. 39.🔦 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
40. 40.💡 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

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