Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 184 · 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.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) a single current path
2. 2.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
3. 3.💡 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
4. 4.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they keep glowing (c) they explode (d) they all go out
5. 5.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
6. 6.💡 3 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
7. 7.Which of these is true of a series circuit? (a) each gets the full volts (b) one out, the rest glow (c) a break stops every bulb (d) used in house wiring
8. 8.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
9. 9.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
10. 10.💡 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?
11. 11.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
12. 12.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
13. 13.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
14. 14.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
15. 15.Which of these is true of a parallel circuit? (a) own switch for each bulb (b) a break stops every bulb (c) one bulb out, all go out (d) a single current path
16. 16.💡 5 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
17. 17.💡 5 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?
18. 18.Which of these is true of a series circuit? (a) one out, the rest glow (b) own switch for each bulb (c) many paths for current (d) a single current path
19. 19.💡 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. Does bulb 2 glow? (a) No (b) Yes
20. 20.💡 3 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?
21. 21.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
22. 22.💡 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?
23. 23.💡 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
24. 24.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) bulbs share the voltage (c) used in house wiring (d) a break stops every bulb
25. 25.💡 3 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
26. 26.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
27. 27.💡 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. Does bulb 2 glow? (a) Yes (b) No
28. 28.💡 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 3 is taken out of its holder. How many bulbs glow?
29. 29.💡 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 2 are taken out of their holders. Does bulb 3 glow? (a) No (b) Yes
30. 30.💡 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?
31. 31.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
32. 32.Which of these is true of a series circuit? (a) used in house wiring (b) one out, the rest glow (c) many paths for current (d) one bulb out, all go out
33. 33.Which of these is true of a parallel circuit? (a) each gets the full volts (b) a single current path (c) bulbs share the voltage (d) a break stops every bulb
34. 34.💡 5 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
35. 35.Which of these is true of a series circuit? (a) one out, the rest glow (b) bulbs share the voltage (c) used in house wiring (d) own switch for each bulb
36. 36.💡 4 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
37. 37.💡 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. How many bulbs glow?
38. 38.💡 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?
39. 39.💡 4 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
40. 40.True or false: “a single current path” is true of a series circuit. (a) True (b) False

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