Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 914 · 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: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
2. 2.Which drawing is the symbol for a cell? (a) one tall, one short bar (b) a circle with an X in it (c) a circle with M inside (d) triangle against a bar
3. 3.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) neither line (c) both lines (d) the longer line
4. 4.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) LED (b) cell (c) diode (d) capacitor
5. 5.🔗 Series or parallel circuit: “each gets the full volts”? (a) parallel (b) series
6. 6.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is OFF, B is ON, C is ON and D is OFF. Does the bulb glow? (a) No (b) Yes
7. 7.🔋 Identical cells side by side (in parallel) give … (a) no voltage (b) double the voltage (c) the same voltage (d) half the voltage
8. 8.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
9. 9.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
10. 10.True or false: if the switch is ON, the circuit is closed and current flows. (a) False (b) True
11. 11.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
12. 12.💡 In a series circuit, how many paths does the current have? (a) one (b) none (c) one for each bulb (d) two
13. 13.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
14. 14.🔘 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
15. 15.💡 6 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulbs 2 and 5 are taken out of their holders. How many bulbs glow?
16. 16.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
17. 17.💡 3 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
18. 18.🔦 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 safety pin. Does the bulb glow? (a) Yes (b) No
19. 19.⚡ What does a night lamp mainly change electricity into? (a) movement (b) heat (c) light (d) sound
20. 20.Which of these is a conductor? (a) a plastic ruler (b) a dry cork (c) a copper wire (d) a woollen thread
21. 21.🔌 Is a paper strip a conductor or an insulator? (a) a conductor (b) an insulator
22. 22.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
23. 23.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a brass key across the gap. Does the bulb glow? (a) No (b) Yes
24. 24.Which of these is safe? (a) fly a kite near wires (b) open a phone charger (c) throw cells in a fire (d) dry your hands first
25. 25.Which drawing is the symbol for a battery? (a) a circle with M inside (b) two or more cell symbols (c) a circle with V inside (d) one tall, one short bar
26. 26.💡 3 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. How many bulbs glow?
27. 27.✏️ In a circuit diagram, which part is drawn as a straight line? (a) LED (b) wire (c) junction (d) capacitor
28. 28.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
29. 29.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) switch (b) capacitor (c) voltmeter (d) battery
30. 30.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
31. 31.Which of these is an insulator? (a) a graphite rod (b) a steel spoon (c) a plastic ruler (d) a steel coin
32. 32.Which drawing is the symbol for a switch? (a) two equal parallel lines (b) triangle against a bar (c) a line lifted at a gap (d) many long-short pairs
33. 33.Which of these uses electricity? (a) a power station (b) a mobile phone (c) a wind turbine (d) a cell
34. 34.🔋 4 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
35. 35.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they explode (c) they get dimmer (d) they all go out
36. 36.🔌 Is a rubber eraser a conductor or an insulator? (a) an insulator (b) a conductor
37. 37.Which of these mainly gives out light? (a) a water heater (b) a torch (c) a doorbell (d) a ceiling fan
38. 38.Which of these is an insulator? (a) a safety pin (b) a copper wire (c) an iron nail (d) a woollen thread
39. 39.💡 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
40. 40.⚠️ Is it safe to fly a kite near wires? (a) not safe (b) safe

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