Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 968 · 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.💡 2 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
2. 2.Which of these uses electricity? (a) a wind turbine (b) a cell (c) a bicycle dynamo (d) a computer
3. 3.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
4. 4.True or false: a small empty box is the symbol for a cell. (a) False (b) True
5. 5.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
6. 6.💡 3 identical bulbs are joined in series with a 7.5 V battery (ideal wires). How many volts does each bulb get? =
7. 7.Which of these is an insulator? (a) an iron nail (b) a steel spoon (c) a dry cork (d) a steel coin
8. 8.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) chemical energy (b) sound energy (c) light energy (d) movement energy
9. 9.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the base (b) the switch (c) the filament (d) the glass
10. 10.💡 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
11. 11.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
12. 12.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is ON, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
13. 13.True or false: an electric toy car mainly gives out heat. (a) True (b) False
14. 14.True or false: a circle with A inside is the symbol for an ammeter. (a) False (b) True
15. 15.Which of these is true of a series circuit? (a) many paths for current (b) one out, the rest glow (c) a single current path (d) own switch for each bulb
16. 16.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) never (b) when either is ON (c) only when both are ON (d) only when both are OFF
17. 17.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they all go out (c) they explode (d) they keep glowing
18. 18.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
19. 19.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 230 V (c) 1.5 V (d) 0.5 V
20. 20.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
21. 21.Which of these means the circuit is open? (a) all wires are joined (b) the switch is ON (c) the loop is complete (d) a wire is cut
22. 22.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
23. 23.💡 3 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
24. 24.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
25. 25.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) dotted circles (c) wavy lines (d) little stars
26. 26.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
27. 27.🔘 Two switches are in series. When does the bulb glow? (a) when either is ON (b) never (c) when both are OFF (d) when both are ON
28. 28.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
29. 29.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
30. 30.Which of these mainly gives out light? (a) a buzzer (b) a night lamp (c) an electric iron (d) a siren
31. 31.Which of these is not safe? (a) dry your hands first (b) build with an adult near (c) take cells out after use (d) climb an electric pole
32. 32.🔋 5 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
33. 33.⚡ What does a mixer grinder mainly change electricity into? (a) heat (b) sound (c) movement (d) light
34. 34.True or false: a brass key is a conductor. (a) True (b) False
35. 35.🔍 Which is the odd one out? (a) a traffic signal (b) a water heater (c) a room heater (d) an electric iron
36. 36.Which of these means the circuit is closed? (a) a cell is taken out (b) all wires are joined (c) a wire has come loose (d) the bulb is unscrewed
37. 37.💡 2 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. Does bulb 2 glow? (a) Yes (b) No
38. 38.🔍 Which is the odd one out? (a) an LED lamp (b) a school bell (c) a torch (d) a tube light
39. 39.⚠️ Is it safe to climb an electric pole? (a) not safe (b) safe
40. 40.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)

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