Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 120 · 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.💡 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
2. 2.Which of these is true of a series circuit? (a) many paths for current (b) one bulb out, all go out (c) used in house wiring (d) own switch for each bulb
3. 3.Which of these is true of a series circuit? (a) a single current path (b) own switch for each bulb (c) one out, the rest glow (d) each gets the full volts
4. 4.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
5. 5.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
6. 6.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one bulb out, all go out (c) many paths for current (d) bulbs share the voltage
7. 7.💡 5 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
8. 8.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
9. 9.💡 Why is house wiring done in parallel? (a) so all go off together (b) to make bulbs dim (c) each gets full voltage (d) to save copper only
10. 10.Which of these is true of a series circuit? (a) bulbs share the voltage (b) own switch for each bulb (c) each gets the full volts (d) one out, the rest glow
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) one out, the rest glow (d) a single current path
12. 12.Which of these is true of a parallel circuit? (a) a single current path (b) bulbs share the voltage (c) a break stops every bulb (d) used in house wiring
13. 13.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they get dimmer (c) they keep glowing (d) they all go out
14. 14.💡 3 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
15. 15.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
16. 16.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
17. 17.💡 2 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
18. 18.💡 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) dimmer (c) brighter
19. 19.💡 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?
20. 20.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
21. 21.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
22. 22.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
23. 23.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
24. 24.💡 6 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
25. 25.💡 5 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
26. 26.💡 5 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
27. 27.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
28. 28.💡 2 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
29. 29.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
30. 30.💡 A battery lights 5 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
31. 31.💡 4 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
32. 32.💡 2 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
33. 33.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
34. 34.💡 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. How many bulbs glow?
35. 35.💡 5 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?
36. 36.💡 2 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
37. 37.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) own switch for each bulb (c) a single current path (d) one bulb out, all go out
38. 38.💡 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 1 and 3 are taken out of their holders. How many bulbs glow?
39. 39.💡 4 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?
40. 40.💡 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 1 and 6 are taken out of their holders. Does bulb 3 glow? (a) Yes (b) No

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