Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 315 · 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.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
3. 3.💡 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 2 is taken out of its holder. How many bulbs glow?
4. 4.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
5. 5.💡 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) the same (c) brighter
6. 6.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
7. 7.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) used in house wiring
8. 8.💡 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. Does bulb 5 glow? (a) No (b) Yes
9. 9.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) to make bulbs dim (d) each gets full voltage
10. 10.💡 3 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
11. 11.💡 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?
12. 12.💡 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 3 is taken out of its holder. How many bulbs glow?
13. 13.💡 6 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
14. 14.💡 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) dimmer (c) brighter
15. 15.💡 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?
16. 16.💡 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?
17. 17.💡 4 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
18. 18.💡 5 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
19. 19.💡 A battery lights 2 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
20. 20.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
21. 21.💡 4 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
22. 22.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one out, the rest glow (c) a single current path (d) bulbs share the voltage
23. 23.💡 6 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?
24. 24.💡 5 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
25. 25.True or false: “a single current path” is true of a series circuit. (a) False (b) True
26. 26.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) many paths for current
27. 27.💡 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 4 are taken out of their holders. Does bulb 5 glow? (a) Yes (b) No
28. 28.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
29. 29.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
30. 30.Which of these is true of a series circuit? (a) each gets the full volts (b) one out, the rest glow (c) used in house wiring (d) a break stops every bulb
31. 31.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
32. 32.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
33. 33.Which of these is true of a series circuit? (a) a single current path (b) one out, the rest glow (c) many paths for current (d) each gets the full volts
34. 34.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) each gets the full volts (c) bulbs share the voltage (d) one bulb out, all go out
35. 35.💡 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?
36. 36.💡 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?
37. 37.💡 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. Does bulb 2 glow? (a) Yes (b) No
38. 38.Which of these is true of a series circuit? (a) one bulb out, all go out (b) own switch for each bulb (c) used in house wiring (d) many paths for current
39. 39.💡 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 2 are taken out of their holders. Does bulb 4 glow? (a) No (b) Yes
40. 40.💡 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?

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