Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 645 · 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 break stops every bulb” is true of a parallel circuit. (a) True (b) False
2. 2.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) straight lines (c) wavy lines (d) little stars
3. 3.Which of these means the circuit is open? (a) the switch is ON (b) all wires are joined (c) the switch is OFF (d) the loop is complete
4. 4.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) it does not matter (c) both of them (d) only one
5. 5.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
6. 6.True or false: if the switch is OFF, the circuit is closed and current flows. (a) True (b) False
7. 7.Which of these mainly makes sound? (a) a torch (b) an electric toy car (c) a tube light (d) a doorbell
8. 8.True or false: a siren mainly gives out light. (a) True (b) False
9. 9.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they get dimmer (c) they explode (d) they keep glowing
10. 10.Which of these mainly makes movement? (a) a table fan (b) a room heater (c) a torch (d) a night lamp
11. 11.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) the longer line (c) both lines (d) neither line
12. 12.True or false: if the bulb is unscrewed, the circuit is closed and current flows. (a) True (b) False
13. 13.💡 A battery lights 4 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
14. 14.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) diode (b) junction (c) motor (d) resistor
15. 15.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
16. 16.⚡ A fan changes electrical energy mainly into which kind of energy? (a) chemical energy (b) movement energy (c) sound energy (d) light energy
17. 17.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
18. 18.True or false: a steel spoon is a conductor. (a) False (b) True
19. 19.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
20. 20.Which of these uses electricity? (a) a battery (b) a cell (c) a television (d) a wind turbine
21. 21.⚠️ Is it safe to dry your hands first? (a) safe (b) not safe
22. 22.True or false: a toggle switch slides side to side. (a) True (b) False
23. 23.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is ON, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
24. 24.⚠️ Is it safe to throw cells in a fire? (a) not safe (b) safe
25. 25.🔘 When a switch is ON, the circuit is … (a) broken (b) cut (c) open (d) closed
26. 26.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 2 glow? (a) No (b) Yes
27. 27.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) cell (b) battery (c) junction (d) wire
28. 28.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
29. 29.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
30. 30.🔋 7 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
31. 31.Which of these mainly gives out light? (a) an electric drill (b) a torch (c) a mixer grinder (d) a buzzer
32. 32.⚡ A solar panel changes which kind of energy into electricity? (a) sound energy (b) chemical energy (c) light energy (d) wind energy
33. 33.Which of these is true of a series circuit? (a) bulbs share the voltage (b) each gets the full volts (c) used in house wiring (d) one out, the rest glow
34. 34.Which drawing is the symbol for a resistor? (a) a circle with an X in it (b) one tall, one short bar (c) a circle with A inside (d) a small empty box
35. 35.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
36. 36.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. How many bulbs glow?
37. 37.💡 4 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
38. 38.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) resistor (b) battery (c) switch (d) junction
39. 39.🔌 Most metals are good … (a) conductors (b) magnets only (c) insulators (d) batteries
40. 40.What does a reed switch do? (a) flips up or down (b) works only while pressed (c) slides side to side (d) closes near a magnet

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