Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 229 · 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.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) cell (b) battery (c) switch (d) junction
2. 2.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) wavy lines (c) little stars (d) straight lines
3. 3.Which of these uses electricity? (a) a power station (b) a water pump (c) a wind turbine (d) a cell
4. 4.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
5. 5.True or false: a push button stays where you flip it. (a) True (b) False
6. 6.🔋 5 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)? =
7. 7.🔁 What must there be for a current to flow? (a) a plastic gap (b) one loose end (c) a broken path (d) a complete loop
8. 8.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
9. 9.Which drawing is the symbol for an LED? (a) two or more cell symbols (b) a circle with V inside (c) triangle, bar and arrows (d) a circle with A inside
10. 10.🔗 Series or parallel circuit: “a single current path”? (a) series (b) parallel
11. 11.💡 4 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
12. 12.Which of these mainly makes movement? (a) a night lamp (b) a loudspeaker (c) a buzzer (d) an electric drill
13. 13.💡 6 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. Bulbs 1 and 5 are taken out of their holders. Does bulb 3 glow? (a) No (b) Yes
14. 14.🔍 Which is the odd one out? (a) a rice cooker (b) a water heater (c) a loudspeaker (d) an electric iron
15. 15.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) False (b) True
16. 16.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
17. 17.True or false: triangle against a bar is the symbol for a diode. (a) False (b) True
18. 18.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) electrons (c) water drops (d) photons
19. 19.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
20. 20.Which of these is a conductor? (a) a dry cork (b) a safety pin (c) a cotton thread (d) a plastic ruler
21. 21.⚡ What does a water heater mainly change electricity into? (a) sound (b) heat (c) movement (d) light
22. 22.Which of these gives us electricity? (a) a computer (b) a mobile phone (c) a battery (d) a water pump
23. 23.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
24. 24.💡 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) the same (c) dimmer
25. 25.💡 5 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
26. 26.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
27. 27.🔍 Which is the odd one out? (a) an electric kettle (b) a water heater (c) a street light (d) an electric iron
28. 28.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
29. 29.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
30. 30.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 15 V (c) 230 V (d) 1.5 V
31. 31.Which of these is true of a series circuit? (a) each gets the full volts (b) used in house wiring (c) many paths for current (d) a break stops every bulb
32. 32.💡 In a series circuit, how many paths does the current have? (a) none (b) one (c) two (d) one for each bulb
33. 33.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a wooden stick across the gap. Does the bulb glow? (a) Yes (b) No
34. 34.True or false: a brass key is a conductor. (a) False (b) True
35. 35.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
36. 36.Which of these is a conductor? (a) a plastic ruler (b) a plastic straw (c) a cotton thread (d) a copper wire
37. 37.🔋 7 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)? =
38. 38.⚠️ Is it safe to take cells out after use? (a) not safe (b) safe
39. 39.💡 5 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. Bulb 5 is taken out of its holder. Does bulb 4 glow? (a) Yes (b) No
40. 40.True or false: “many paths for current” is true of a series circuit. (a) True (b) False

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