Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 120 · 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.🔋 3 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
2. 2.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) both of them (b) it does not matter (c) only one (d) none
3. 3.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a rubber eraser. Does the bulb glow? (a) Yes (b) No
4. 4.🔍 Which is the odd one out? (a) a steel coin (b) a safety pin (c) a steel spoon (d) a cotton thread
5. 5.💡 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) the same (c) brighter
6. 6.🔍 Which is the odd one out? (a) an electric drill (b) a doorbell (c) a table fan (d) an electric toy car
7. 7.🔘 Which kind of switch closes when tipped over? (a) a reed switch (b) a push button (c) a tilt switch (d) a slide switch
8. 8.True or false: many long-short pairs is the symbol for a battery. (a) False (b) True
9. 9.Which of these is safe? (a) stop if a part gets hot (b) climb an electric pole (c) use mains for a project (d) poke things in a socket
10. 10.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) electrons (c) photons (d) water drops
11. 11.Which of these is an insulator? (a) a safety pin (b) a metal paper clip (c) a paper strip (d) aluminium foil
12. 12.💡 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
13. 13.🔗 Series or parallel circuit: “one out, the rest glow”? (a) parallel (b) series
14. 14.🔋 A 12 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
15. 15.💡 A battery lights 5 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
16. 16.💡 A battery lights 3 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
17. 17.🔋 Does a washing machine give electricity or use electricity? (a) gives electricity (b) uses electricity
18. 18.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
19. 19.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
20. 20.⚠️ Why must we never touch switches with wet hands? (a) water makes it cold (b) water carries current (c) it is just untidy (d) it spoils the paint
21. 21.🔋 Does a solar panel give electricity or use electricity? (a) uses electricity (b) gives electricity
22. 22.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) capacitor (b) resistor (c) ammeter (d) junction
23. 23.Which of these gives us electricity? (a) a refrigerator (b) a computer (c) a water pump (d) a battery
24. 24.Which of these uses electricity? (a) a bicycle dynamo (b) a mobile phone (c) a power station (d) a cell
25. 25.Which of these gives us electricity? (a) a television (b) a generator (c) an air conditioner (d) a refrigerator
26. 26.Which of these gives us electricity? (a) a television (b) a washing machine (c) a power station (d) a computer
27. 27.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) ammeter (b) voltmeter (c) resistor (d) capacitor
28. 28.💡 A battery lights 3 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.🔍 Which is the odd one out? (a) a torch (b) a tube light (c) an LED lamp (d) an electric kettle
30. 30.⚡ A solar panel changes which kind of energy into electricity? (a) sound energy (b) wind energy (c) chemical energy (d) light energy
31. 31.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is OFF and C is ON. Does the bulb glow? (a) Yes (b) No
32. 32.⚡ What does a street light mainly change electricity into? (a) sound (b) heat (c) movement (d) light
33. 33.💡 In a series circuit, how many paths does the current have? (a) none (b) one for each bulb (c) one (d) two
34. 34.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) neither line (c) the shorter line (d) the longer line
35. 35.🔘 Two switches are in series. When does the bulb glow? (a) when both are OFF (b) never (c) when either is ON (d) when both are ON
36. 36.Which of these is true of a parallel circuit? (a) own switch for each bulb (b) a single current path (c) one bulb out, all go out (d) bulbs share the voltage
37. 37.True or false: triangle against a bar is the symbol for an LED. (a) True (b) False
38. 38.✏️ In a circuit diagram, which part is drawn as a straight line? (a) wire (b) LED (c) diode (d) cell
39. 39.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to make bulbs dim (c) to save copper only (d) so all go off together
40. 40.Which drawing is the symbol for a junction? (a) a circle with M inside (b) a dot where wires meet (c) two or more cell symbols (d) a small empty box

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