Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 28 · 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.Which of these is true of a parallel circuit? (a) many paths for current (b) a single current path (c) a break stops every bulb (d) one bulb out, all go out
2. 2.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
3. 3.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they keep glowing (c) they explode (d) they all go out
4. 4.💡 3 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
5. 5.💡 Why is house wiring done in parallel? (a) to save copper only (b) each gets full voltage (c) so all go off together (d) to make bulbs dim
6. 6.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
7. 7.💡 5 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?
8. 8.Which of these is true of a series circuit? (a) one out, the rest glow (b) many paths for current (c) a break stops every bulb (d) own switch for each bulb
9. 9.True or false: “a single current path” is true of a series circuit. (a) False (b) True
10. 10.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
11. 11.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a single current path (c) bulbs share the voltage (d) used in house wiring
12. 12.💡 4 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 3 and 4 are taken out of their holders. How many bulbs glow?
13. 13.💡 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. Bulbs 2 and 3 are taken out of their holders. Does bulb 1 glow? (a) No (b) Yes
14. 14.💡 4 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
15. 15.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
16. 16.💡 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
17. 17.💡 3 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
18. 18.💡 4 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. Does bulb 2 glow? (a) No (b) Yes
19. 19.💡 4 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?
20. 20.💡 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 5 is taken out of its holder. Does bulb 1 glow? (a) No (b) Yes
21. 21.Which of these is true of a parallel circuit? (a) a single current path (b) a break stops every bulb (c) bulbs share the voltage (d) own switch for each bulb
22. 22.Which of these is true of a series circuit? (a) each gets the full volts (b) many paths for current (c) bulbs share the voltage (d) own switch for each bulb
23. 23.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
24. 24.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
25. 25.💡 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?
26. 26.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
27. 27.💡 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. Does bulb 2 glow? (a) Yes (b) No
28. 28.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a break stops every bulb (c) one out, the rest glow (d) a single current path
29. 29.💡 A battery lights 4 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
30. 30.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
31. 31.💡 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?
32. 32.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
33. 33.💡 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. All the bulbs are in place. How many bulbs glow?
34. 34.💡 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. Bulb 5 is taken out of its holder. How many bulbs glow?
35. 35.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
36. 36.Which of these is true of a series circuit? (a) one bulb out, all go out (b) one out, the rest glow (c) many paths for current (d) each gets the full volts
37. 37.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
38. 38.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a break stops every bulb (c) a single current path (d) each gets the full volts
39. 39.💡 4 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
40. 40.💡 4 identical bulbs are in parallel and each bulb has its own switch on its path. 3 of the switches are OFF and the rest are ON. How many bulbs glow?

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