Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 34 · 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 series circuit? (a) many paths for current (b) one out, the rest glow (c) each gets the full volts (d) one bulb out, all go out
2. 2.💡 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. How many bulbs glow?
3. 3.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
4. 4.Which of these is true of a series circuit? (a) one out, the rest glow (b) a break stops every bulb (c) many paths for current (d) each gets the full volts
5. 5.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they keep glowing (c) they explode (d) they get dimmer
6. 6.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
7. 7.💡 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
8. 8.Which of these is true of a parallel circuit? (a) a single current path (b) bulbs share the voltage (c) one out, the rest glow (d) a break stops every bulb
9. 9.Which of these is true of a parallel circuit? (a) a single current path (b) a break stops every bulb (c) bulbs share the voltage (d) used in house wiring
10. 10.Which of these is true of a series circuit? (a) many paths for current (b) a single current path (c) own switch for each bulb (d) each gets the full volts
11. 11.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) to save copper only (c) so all go off together (d) each gets full voltage
12. 12.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
13. 13.💡 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
14. 14.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
15. 15.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
16. 16.💡 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 4 and 5 are taken out of their holders. How many bulbs glow?
17. 17.💡 2 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
18. 18.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
19. 19.💡 4 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
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 5 are taken out of their holders. How many bulbs glow?
21. 21.💡 4 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?
22. 22.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
23. 23.True or false: “a single current path” is true of a series circuit. (a) True (b) False
24. 24.💡 3 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
25. 25.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
26. 26.Which of these is true of a series circuit? (a) used in house wiring (b) many paths for current (c) one out, the rest glow (d) bulbs share the voltage
27. 27.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
28. 28.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
29. 29.💡 4 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
30. 30.💡 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. All the bulbs are in place. How many bulbs glow?
31. 31.💡 6 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
32. 32.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) own switch for each bulb
33. 33.💡 6 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?
34. 34.💡 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
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.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
37. 37.💡 5 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
38. 38.💡 6 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
39. 39.💡 3 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
40. 40.💡 5 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =

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