Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 601 · 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: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
2. 2.🔍 Which is the odd one out? (a) a night lamp (b) a torch (c) a toaster (d) an LED lamp
3. 3.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
4. 4.🔘 Which kind of switch closes when tipped over? (a) a push button (b) a toggle switch (c) a slide switch (d) a tilt switch
5. 5.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
6. 6.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) chemical energy (b) movement energy (c) sound energy (d) light energy
7. 7.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) ammeter (b) junction (c) cell (d) capacitor
8. 8.🔍 Which is the odd one out? (a) a rubber band (b) a metal paper clip (c) a woollen thread (d) a glass marble
9. 9.🔦 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 copper wire. Does the bulb glow? (a) No (b) Yes
10. 10.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) switch (b) bulb (c) cell (d) LED
11. 11.⚡ What does a loudspeaker mainly change electricity into? (a) movement (b) heat (c) light (d) sound
12. 12.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) junction (b) diode (c) LED (d) switch
13. 13.🔍 Which is the odd one out? (a) a siren (b) a buzzer (c) a doorbell (d) an electric kettle
14. 14.💡 2 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
15. 15.⚠️ Is it safe to take cells out after use? (a) not safe (b) safe
16. 16.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) the switch is ON (c) the switch is OFF (d) a cell is taken out
17. 17.True or false: a plain rectangle is the symbol for a resistor. (a) True (b) False
18. 18.💡 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) brighter (c) dimmer
19. 19.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
20. 20.True or false: if a wire has come loose, the circuit is closed and current flows. (a) True (b) False
21. 21.🔋 What should you do with used-up cells? (a) throw them in a fire (b) cut them open (c) give them for recycling (d) bury them in soil
22. 22.🔋 Does a bicycle dynamo give electricity or use electricity? (a) uses electricity (b) gives electricity
23. 23.🔌 Most metals are good … (a) insulators (b) conductors (c) magnets only (d) batteries
24. 24.🔋 A 3 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
25. 25.🔁 What must there be for a current to flow? (a) one loose end (b) a complete loop (c) a plastic gap (d) a broken path
26. 26.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) symbols are heavier (c) quick and clear for all (d) to hide the circuit
27. 27.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
28. 28.True or false: a tilt switch closes when tipped over. (a) False (b) True
29. 29.Which of these is true of a series circuit? (a) each gets the full volts (b) used in house wiring (c) own switch for each bulb (d) one bulb out, all go out
30. 30.⚠️ Who should be with you when you build a circuit? (a) a trusted adult (b) a stranger online (c) nobody (d) a younger child
31. 31.💡 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
32. 32.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the switch (c) the base (d) the filament
33. 33.Which of these mainly makes movement? (a) an electric toy car (b) an electric iron (c) a water heater (d) a siren
34. 34.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) it does not matter (b) none (c) only one (d) both of them
35. 35.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) when either is ON (b) never (c) only when both are ON (d) only when both are OFF
36. 36.⚡ What does a street light mainly change electricity into? (a) sound (b) heat (c) light (d) movement
37. 37.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
38. 38.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
39. 39.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) by Wi-Fi (c) not joined (d) in parallel
40. 40.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) a switch that is ON (c) an insulator (d) a cell

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