Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 270 · 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.💡 5 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
2. 2.💡 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 2 and 3 are taken out of their holders. How many bulbs glow?
3. 3.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
4. 4.💡 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?
5. 5.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) each gets full voltage (d) to make bulbs dim
6. 6.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
7. 7.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they get dimmer (c) they explode (d) they keep glowing
8. 8.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a single current path (c) one bulb out, all go out (d) own switch for each bulb
9. 9.💡 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) brighter (c) the same
10. 10.True or false: “a single current path” 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) bulbs share the voltage (c) a break stops every bulb (d) many paths for current
12. 12.Which of these is true of a series circuit? (a) own switch for each bulb (b) a break stops every bulb (c) each gets the full volts (d) one out, the rest glow
13. 13.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) bulbs share the voltage (c) a single current path (d) one out, the rest glow
14. 14.Which of these is true of a series circuit? (a) one out, the rest glow (b) own switch for each bulb (c) a single current path (d) each gets the full volts
15. 15.💡 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?
16. 16.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
17. 17.💡 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 2 is taken out of its holder. Does bulb 4 glow? (a) Yes (b) No
18. 18.💡 A battery lights 2 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
19. 19.💡 4 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
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. Bulbs 1 and 4 are taken out of their holders. Does bulb 5 glow? (a) Yes (b) No
21. 21.💡 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 2 and 4 are taken out of their holders. How many bulbs glow?
22. 22.💡 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?
23. 23.💡 3 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
24. 24.💡 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?
25. 25.Which of these is true of a series circuit? (a) used in house wiring (b) one out, the rest glow (c) one bulb out, all go out (d) many paths for current
26. 26.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a single current path (c) each gets the full volts (d) a break stops every bulb
27. 27.💡 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?
28. 28.💡 A battery lights 4 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
29. 29.💡 2 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
30. 30.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
31. 31.💡 2 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
32. 32.💡 2 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
33. 33.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
34. 34.💡 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. Does bulb 2 glow? (a) Yes (b) No
35. 35.True or false: “a single current path” is true of a series circuit. (a) True (b) False
36. 36.Which of these is true of a series circuit? (a) one out, the rest glow (b) bulbs share the voltage (c) many paths for current (d) own switch for each bulb
37. 37.💡 2 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
38. 38.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
39. 39.💡 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
40. 40.💡 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?

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