Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 70 · 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 get dimmer (b) they keep glowing (c) they all go out (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.💡 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
4. 4.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) each gets full voltage (d) so all go off together
5. 5.💡 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 5 are taken out of their holders. How many bulbs glow?
6. 6.💡 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) the same (c) dimmer
7. 7.💡 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 3 and 5 are taken out of their holders. Does bulb 1 glow? (a) No (b) Yes
8. 8.💡 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?
9. 9.💡 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. How many bulbs glow?
10. 10.True or false: “each gets the full volts” is true of a series 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 break stops every bulb (c) a single current path (d) one out, the rest glow
12. 12.💡 5 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
13. 13.Which of these is true of a series circuit? (a) used in house wiring (b) bulbs share the voltage (c) many paths for current (d) one out, the rest glow
14. 14.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one bulb out, all go out (c) own switch for each bulb (d) a single current path
15. 15.💡 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?
16. 16.Which of these is true of a series circuit? (a) one out, the rest glow (b) many paths for current (c) a single current path (d) used in house wiring
17. 17.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
18. 18.Which of these is true of a series circuit? (a) each gets the full volts (b) used in house wiring (c) one bulb out, all go out (d) own switch for each bulb
19. 19.Which of these is true of a parallel circuit? (a) a single current path (b) a break stops every bulb (c) one bulb out, all go out (d) each gets the full volts
20. 20.💡 3 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
21. 21.💡 2 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
22. 22.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
23. 23.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
24. 24.💡 5 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
25. 25.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
26. 26.💡 4 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
27. 27.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one bulb out, all go out (c) a single current path (d) used in house wiring
28. 28.💡 3 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
29. 29.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
30. 30.💡 6 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?
31. 31.💡 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?
32. 32.💡 2 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
33. 33.True or false: “a single current path” is true of a series circuit. (a) False (b) True
34. 34.💡 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 4 are taken out of their holders. How many bulbs glow?
35. 35.Which of these is true of a parallel circuit? (a) a single current path (b) one bulb out, all go out (c) a break stops every bulb (d) many paths for current
36. 36.💡 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 2 is taken out of its holder. How many bulbs glow?
37. 37.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 4 of the switches are OFF and the rest are ON. How many bulbs glow?
38. 38.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
39. 39.💡 2 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
40. 40.💡 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?

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