Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 206 · 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 loudspeaker mainly change electricity into? (a) movement (b) light (c) sound (d) heat
2. 2.Which of these mainly gives out heat? (a) a room heater (b) a street light (c) an electric toy car (d) a traffic signal
3. 3.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
4. 4.True or false: if the switch is OFF, the circuit is closed and current flows. (a) True (b) False
5. 5.💡 In a series circuit, how many paths does the current have? (a) none (b) one (c) one for each bulb (d) two
6. 6.💡 2 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
7. 7.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
8. 8.Which of these gives us electricity? (a) a refrigerator (b) a computer (c) a television (d) a bicycle dynamo
9. 9.Which of these means the circuit is open? (a) all wires are joined (b) a wire has come loose (c) the loop is complete (d) the switch is ON
10. 10.Which of these is safe? (a) touch a switch when wet (b) fly a kite near wires (c) use small battery cells (d) climb an electric pole
11. 11.🔘 Which kind of switch slides side to side? (a) a push button (b) a tilt switch (c) a reed switch (d) a slide switch
12. 12.🔋 How many 2 V cells must be joined in series to give 16 V?
13. 13.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
14. 14.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) diode (b) cell (c) switch (d) battery
15. 15.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
16. 16.🔍 Which is the odd one out? (a) a copper wire (b) a graphite rod (c) a steel coin (d) a rubber band
17. 17.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
18. 18.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) junction (b) capacitor (c) LED (d) resistor
19. 19.🔋 How many 2 V cells must be joined in series to give 8 V?
20. 20.🔌 A gap of dry air between two wires acts as … (a) a cell (b) a conductor (c) a switch that is ON (d) an insulator
21. 21.🔘 Which kind of switch stays where you flip it? (a) a slide switch (b) a toggle switch (c) a push button (d) a reed switch
22. 22.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
23. 23.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) to make it colourful (c) to hide the circuit (d) quick and clear for all
24. 24.True or false: a reed switch springs back when let go. (a) True (b) False
25. 25.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
26. 26.Which drawing is the symbol for a switch? (a) a long and a short line (b) many long-short pairs (c) a straight line (d) a line lifted at a gap
27. 27.💡 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
28. 28.Which of these is true of a series circuit? (a) each gets the full volts (b) a single current path (c) many paths for current (d) one out, the rest glow
29. 29.🔍 Which is the odd one out? (a) a dry cork (b) a wooden stick (c) a rubber band (d) a safety pin
30. 30.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
31. 31.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a woollen thread across the gap. Does the bulb glow? (a) Yes (b) No
32. 32.🔦 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
33. 33.Which of these means the circuit is open? (a) a wire is cut (b) the switch is ON (c) the loop is complete (d) all wires are joined
34. 34.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
35. 35.🔦 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
36. 36.🔋 A 3 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
37. 37.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
38. 38.Which of these is not safe? (a) build with an adult near (b) fly kites in open fields (c) stop if a part gets hot (d) use a cable with cuts
39. 39.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
40. 40.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) each gets full voltage (d) to make bulbs dim

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