Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 725 · 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: “a single current path” is true of a parallel circuit. (a) True (b) False
2. 2.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) motor (b) junction (c) resistor (d) battery
3. 3.Which drawing is the symbol for a battery? (a) a plain rectangle (b) a long and a short line (c) many long-short pairs (d) a circle with an X in it
4. 4.Which of these means the circuit is open? (a) all wires are joined (b) the loop is complete (c) a wire is cut (d) the switch is ON
5. 5.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
6. 6.Which of these is true of a parallel circuit? (a) a single current path (b) one bulb out, all go out (c) many paths for current (d) bulbs share the voltage
7. 7.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
8. 8.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) double the voltage (c) no voltage (d) the same voltage
9. 9.🔘 Which kind of switch springs back when let go? (a) a reed switch (b) a toggle switch (c) a tilt switch (d) a push button
10. 10.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open
11. 11.🔍 Which is the odd one out? (a) stop if a part gets hot (b) build with an adult near (c) stay away from pylons (d) touch a fallen wire
12. 12.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they get dimmer (c) they all go out (d) they explode
13. 13.Which of these is true of a parallel circuit? (a) a single current path (b) one bulb out, all go out (c) used in house wiring (d) bulbs share the voltage
14. 14.True or false: a slide switch closes near a magnet. (a) True (b) False
15. 15.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
16. 16.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) only when both are ON (c) never (d) when either is ON
17. 17.Which of these mainly makes movement? (a) an electric iron (b) a water heater (c) a traffic signal (d) a table fan
18. 18.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
19. 19.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
20. 20.Which of these mainly gives out light? (a) a table fan (b) a street light (c) an electric kettle (d) a siren
21. 21.True or false: if a wire is cut, the circuit is closed and current flows. (a) True (b) False
22. 22.⚡ A fan changes electrical energy mainly into which kind of energy? (a) sound energy (b) light energy (c) chemical energy (d) movement energy
23. 23.True or false: one tall, one short bar is the symbol for a cell. (a) False (b) True
24. 24.🔋 How many 1.2 V cells must be joined in series to give 2.4 V?
25. 25.🔌 Is a ceramic cup a conductor or an insulator? (a) a conductor (b) an insulator
26. 26.🔋 2 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
27. 27.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
28. 28.Which of these gives us electricity? (a) a washing machine (b) a battery (c) a television (d) a computer
29. 29.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) so all go off together (c) to make bulbs dim (d) to save copper only
30. 30.💡 5 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
31. 31.Which of these means the circuit is open? (a) a cell is taken out (b) the switch is ON (c) all wires are joined (d) the loop is complete
32. 32.True or false: a buzzer mainly gives out light. (a) False (b) True
33. 33.Which of these is not safe? (a) stop if a part gets hot (b) use small battery cells (c) open a phone charger (d) fly kites in open fields
34. 34.⚠️ Is it safe to build with an adult near? (a) not safe (b) safe
35. 35.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
36. 36.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
37. 37.⚡ What does a doorbell mainly change electricity into? (a) light (b) heat (c) movement (d) sound
38. 38.🔍 Which is the odd one out? (a) aluminium foil (b) a wooden stick (c) a copper wire (d) a steel spoon
39. 39.🔋 Does a water pump give electricity or use electricity? (a) gives electricity (b) uses electricity
40. 40.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?

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