Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 3 · 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.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they keep glowing (c) they get dimmer (d) they explode
2. 2.💡 A battery lights 5 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
3. 3.Which of these is true of a parallel circuit? (a) own switch for each bulb (b) bulbs share the voltage (c) one bulb out, all go out (d) a single current path
4. 4.💡 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
5. 5.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a single current path (c) many paths for current (d) a break stops every bulb
6. 6.Which of these is true of a series circuit? (a) one out, the rest glow (b) one bulb out, all go out (c) each gets the full volts (d) many paths for current
7. 7.💡 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 1 and 3 are taken out of their holders. How many bulbs glow?
8. 8.💡 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. All the bulbs are in place. How many bulbs glow?
9. 9.💡 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) brighter (c) dimmer
10. 10.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
11. 11.💡 4 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
12. 12.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
13. 13.Which of these is true of a series circuit? (a) used in house wiring (b) many paths for current (c) a break stops every bulb (d) one out, the rest glow
14. 14.Which of these is true of a parallel circuit? (a) each gets the full volts (b) a single current path (c) bulbs share the voltage (d) one bulb out, all go out
15. 15.💡 2 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
16. 16.💡 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. How many bulbs glow?
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.💡 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 1 and 2 are taken out of their holders. How many bulbs glow?
19. 19.💡 5 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
20. 20.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
21. 21.💡 4 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
22. 22.💡 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. Does bulb 3 glow? (a) Yes (b) No
23. 23.💡 4 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
24. 24.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
25. 25.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
26. 26.Which of these is true of a series circuit? (a) many paths for current (b) each gets the full volts (c) used in house wiring (d) a single current path
27. 27.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
28. 28.💡 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
29. 29.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one out, the rest glow (c) one bulb out, all go out (d) a break stops every bulb
30. 30.💡 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. Bulbs 1 and 3 are taken out of their holders. How many bulbs glow?
31. 31.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
32. 32.💡 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 1 and 2 are taken out of their holders. How many bulbs glow?
33. 33.💡 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?
34. 34.💡 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?
35. 35.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
36. 36.💡 5 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?
37. 37.💡 A battery lights 3 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
38. 38.💡 3 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
39. 39.💡 4 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
40. 40.💡 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?

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