Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 126 · 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 is a battery? (a) two or more cells joined (b) a switch with a lid (c) one single wire (d) a kind of bulb
2. 2.🔁 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
3. 3.🔋 3 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)? =
4. 4.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
5. 5.Which of these is not safe? (a) stop if a part gets hot (b) dry your hands first (c) throw cells in a fire (d) stay away from pylons
6. 6.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a glass marble. Does the bulb glow? (a) No (b) Yes
7. 7.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) so all go off together (c) each gets full voltage (d) to save copper only
8. 8.Which of these mainly makes movement? (a) an electric drill (b) a street light (c) an electric iron (d) an electric kettle
9. 9.Which drawing is the symbol for an LED? (a) a long and a short line (b) triangle, bar and arrows (c) a circle with an X in it (d) a plain rectangle
10. 10.⚠️ Why must we never touch switches with wet hands? (a) it is just untidy (b) water carries current (c) it spoils the paint (d) water makes it cold
11. 11.🔘 Which kind of switch slides side to side? (a) a slide switch (b) a toggle switch (c) a tilt switch (d) a reed switch
12. 12.Which of these is not safe? (a) take cells out after use (b) fly a kite near wires (c) use small battery cells (d) stay away from pylons
13. 13.True or false: a tilt switch works only while pressed. (a) True (b) False
14. 14.True or false: a reed switch slides side to side. (a) True (b) False
15. 15.🔌 Is a rubber eraser a conductor or an insulator? (a) an insulator (b) a conductor
16. 16.True or false: a toggle switch flips up or down. (a) False (b) True
17. 17.🔦 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) Yes (b) No
18. 18.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
19. 19.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
20. 20.🔗 Series or parallel circuit: “one out, the rest glow”? (a) series (b) parallel
21. 21.True or false: an electric drill mainly makes sound. (a) True (b) False
22. 22.True or false: to build with an adult near is safe. (a) False (b) True
23. 23.⚠️ Is it safe to use a cable with cuts? (a) not safe (b) safe
24. 24.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) switch (b) capacitor (c) cell (d) wire
25. 25.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) LED (b) cell (c) junction (d) wire
26. 26.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the longer line (c) both lines (d) the shorter line
27. 27.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one bulb out, all go out (c) own switch for each bulb (d) bulbs share the voltage
28. 28.True or false: two or more cell symbols is the symbol for a battery. (a) False (b) True
29. 29.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) battery (b) wire (c) bulb (d) diode
30. 30.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) the same voltage (c) a bigger voltage (d) a smaller voltage
31. 31.Which of these mainly makes movement? (a) a buzzer (b) a loudspeaker (c) a table fan (d) a school bell
32. 32.🔋 6 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)? =
33. 33.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
34. 34.⚠️ Is it safe to fly a kite near wires? (a) not safe (b) safe
35. 35.Which of these is safe? (a) touch a switch when wet (b) stop if a part gets hot (c) fly a kite near wires (d) open a phone charger
36. 36.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
37. 37.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) symbols are heavier (c) to make it colourful (d) quick and clear for all
38. 38.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) when either is ON (b) only when both are ON (c) only when both are OFF (d) never
39. 39.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) wavy lines (c) straight lines (d) dotted circles
40. 40.True or false: a traffic signal mainly gives out heat. (a) False (b) True

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