Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 237 · 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.💡 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
2. 2.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
3. 3.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
4. 4.💡 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 1 glow? (a) No (b) Yes
5. 5.Which of these is true of a parallel circuit? (a) used in house wiring (b) one bulb out, all go out (c) bulbs share the voltage (d) a single current path
6. 6.💡 3 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
7. 7.💡 4 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
8. 8.💡 4 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
9. 9.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
10. 10.💡 3 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
11. 11.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
12. 12.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
13. 13.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
14. 14.Which of these is true of a parallel circuit? (a) a single current path (b) a break stops every bulb (c) each gets the full volts (d) one bulb out, all go out
15. 15.💡 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?
16. 16.💡 A battery lights 3 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
17. 17.💡 2 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
18. 18.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) so all go off together (c) to save copper only (d) each gets full voltage
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) the same (b) dimmer (c) brighter
20. 20.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) a single current path (c) many paths for current (d) one bulb out, all go out
21. 21.True or false: “a single current path” is true of a series circuit. (a) False (b) True
22. 22.Which of these is true of a series circuit? (a) a single current path (b) own switch for each bulb (c) one out, the rest glow (d) many paths for current
23. 23.💡 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. Does bulb 4 glow? (a) Yes (b) No
24. 24.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
25. 25.💡 2 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
26. 26.💡 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?
27. 27.💡 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 3 and 4 are taken out of their holders. Does bulb 2 glow? (a) Yes (b) No
28. 28.💡 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. Bulb 3 is taken out of its holder. How many bulbs glow?
29. 29.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
30. 30.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
31. 31.Which of these is true of a series circuit? (a) each gets the full volts (b) one out, the rest glow (c) many paths for current (d) bulbs share the voltage
32. 32.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
33. 33.💡 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 3 are taken out of their holders. How many bulbs glow?
34. 34.Which of these is true of a series circuit? (a) a break stops every bulb (b) many paths for current (c) each gets the full volts (d) one out, the rest glow
35. 35.💡 A battery lights 4 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
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. Bulbs 3 and 6 are taken out of their holders. How many bulbs glow?
37. 37.💡 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
38. 38.💡 6 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
39. 39.💡 4 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
40. 40.💡 5 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =

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