Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 10 · 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.💡 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
3. 3.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) own switch for each bulb (c) bulbs share the voltage (d) one bulb out, all go out
4. 4.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
5. 5.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
6. 6.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
7. 7.💡 5 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
8. 8.💡 5 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?
9. 9.💡 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?
10. 10.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
11. 11.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
12. 12.Which of these is true of a series circuit? (a) a break stops every bulb (b) one out, the rest glow (c) each gets the full volts (d) own switch for each bulb
13. 13.💡 3 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
14. 14.💡 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?
15. 15.💡 2 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
16. 16.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
17. 17.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
18. 18.Which of these is true of a series circuit? (a) own switch for each bulb (b) a single current path (c) used in house wiring (d) many paths for current
19. 19.💡 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
20. 20.💡 3 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
21. 21.💡 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. Does bulb 2 glow? (a) No (b) Yes
22. 22.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
23. 23.💡 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 3 glow? (a) Yes (b) No
24. 24.Which of these is true of a series circuit? (a) used in house wiring (b) own switch for each bulb (c) one bulb out, all go out (d) many paths for current
25. 25.💡 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) dimmer (c) the same
26. 26.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
27. 27.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
28. 28.💡 4 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
29. 29.Which of these is true of a parallel circuit? (a) a single current path (b) bulbs share the voltage (c) each gets the full volts (d) one bulb out, all go out
30. 30.💡 5 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
31. 31.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they get dimmer (c) they explode (d) they all go out
32. 32.💡 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
33. 33.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
34. 34.💡 3 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
35. 35.💡 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 3 and 4 are taken out of their holders. How many bulbs glow?
36. 36.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
37. 37.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
38. 38.💡 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?
39. 39.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) each gets the full volts
40. 40.💡 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 1 is taken out of its holder. Does bulb 2 glow? (a) Yes (b) No

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