Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 321 · 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.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
2. 2.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
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) dimmer (b) the same (c) brighter
4. 4.Which of these is true of a series circuit? (a) bulbs share the voltage (b) one out, the rest glow (c) many paths for current (d) each gets the full volts
5. 5.Which of these is true of a series circuit? (a) each gets the full volts (b) own switch for each bulb (c) a single current path (d) used in house wiring
6. 6.💡 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?
7. 7.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they get dimmer (c) they all go out (d) they explode
8. 8.💡 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. Bulb 5 is taken out of its holder. 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. Bulbs 1 and 3 are taken out of their holders. How many bulbs glow?
10. 10.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) used in house wiring (c) one bulb out, all go out (d) a single current path
11. 11.💡 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
12. 12.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
13. 13.💡 5 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
14. 14.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
15. 15.Which of these is true of a series circuit? (a) many paths for current (b) a break stops every bulb (c) one out, the rest glow (d) used in house wiring
16. 16.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) bulbs share the voltage (c) many paths for current (d) a single current path
17. 17.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
18. 18.💡 4 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
19. 19.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
20. 20.💡 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?
21. 21.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
22. 22.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
23. 23.Which of these is true of a parallel circuit? (a) one out, the rest glow (b) one bulb out, all go out (c) a single current path (d) a break stops every bulb
24. 24.💡 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
25. 25.💡 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?
26. 26.💡 5 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
27. 27.💡 3 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
28. 28.💡 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 4 are taken out of their holders. Does bulb 5 glow? (a) Yes (b) No
29. 29.💡 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
30. 30.💡 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. Does bulb 1 glow? (a) No (b) Yes
31. 31.💡 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?
32. 32.💡 5 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
33. 33.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a break stops every bulb (c) a single current path (d) each gets the full volts
34. 34.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
35. 35.💡 6 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
36. 36.💡 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. Bulb 6 is taken out of its holder. Does bulb 2 glow? (a) Yes (b) No
37. 37.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
38. 38.💡 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 1 is taken out of its holder. How many bulbs glow?
39. 39.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
40. 40.💡 4 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =

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