Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 110 · 40 questions

Remember (A path for each): Each bulb has its own path: removing one leaves the others glowing. Each bulb gets the full battery voltage. Total current = add the current of each path (n identical bulbs → n × one bulb’s current).

1. 1.💡 2 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 1 and 2 are taken out of their holders. How many bulbs glow?
2. 2.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
3. 3.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
4. 4.💡 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) the same (c) brighter
5. 5.Which of these is true of a parallel circuit? (a) a single current path (b) a break stops every bulb (c) many paths for current (d) one bulb out, all go out
6. 6.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
7. 7.💡 4 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
8. 8.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they explode (c) they keep glowing (d) they all go out
9. 9.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
10. 10.Which of these is true of a series circuit? (a) own switch for each bulb (b) many paths for current (c) a single current path (d) one out, the rest glow
11. 11.Which of these is true of a series circuit? (a) many paths for current (b) bulbs share the voltage (c) one out, the rest glow (d) own switch for each bulb
12. 12.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) each gets full voltage (d) to make bulbs dim
13. 13.💡 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 4 are taken out of their holders. How many bulbs glow?
14. 14.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
15. 15.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
16. 16.💡 5 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
17. 17.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
18. 18.Which of these is true of a parallel circuit? (a) each gets the full volts (b) bulbs share the voltage (c) a single current path (d) one bulb out, all go out
19. 19.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
20. 20.💡 2 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 1 is taken out of its holder. How many bulbs glow?
21. 21.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
22. 22.💡 5 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
23. 23.💡 4 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
24. 24.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
25. 25.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
26. 26.Which of these is true of a parallel circuit? (a) own switch for each bulb (b) one bulb out, all go out (c) a break stops every bulb (d) a single current path
27. 27.💡 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. All the bulbs are in place. Does bulb 1 glow? (a) No (b) Yes
28. 28.💡 5 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 1 is taken out of its holder. How many bulbs glow?
29. 29.💡 2 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
30. 30.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 5 of the switches are OFF and the rest are ON. How many bulbs glow?
31. 31.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
32. 32.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
33. 33.💡 6 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
34. 34.💡 3 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?
35. 35.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
36. 36.True or false: “a single current path” is true of a series circuit. (a) True (b) False
37. 37.💡 3 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
38. 38.💡 6 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
39. 39.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
40. 40.Which of these is true of a series circuit? (a) used in house wiring (b) a break stops every bulb (c) many paths for current (d) each gets the full volts

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