Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 239 · 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.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to make bulbs dim (c) so all go off together (d) to save copper only
2. 2.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
3. 3.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
4. 4.True or false: “a single current path” is true of a series circuit. (a) False (b) True
5. 5.💡 3 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
6. 6.💡 6 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?
7. 7.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they all go out (c) they get dimmer (d) they explode
8. 8.💡 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. How many bulbs glow?
9. 9.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
10. 10.💡 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
11. 11.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
12. 12.Which of these is true of a series circuit? (a) one bulb out, all go out (b) each gets the full volts (c) many paths for current (d) own switch for each bulb
13. 13.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
14. 14.💡 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?
15. 15.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
16. 16.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
17. 17.💡 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. Does bulb 5 glow? (a) No (b) Yes
18. 18.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) bulbs share the voltage (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. Bulb 2 is taken out of its holder. Does bulb 1 glow? (a) No (b) Yes
20. 20.Which of these is true of a parallel circuit? (a) own switch for each bulb (b) bulbs share the voltage (c) one bulb out, all go out (d) a single current path
21. 21.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
22. 22.💡 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 2 are taken out of their holders. Does bulb 3 glow? (a) Yes (b) No
23. 23.💡 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?
24. 24.Which of these is true of a series circuit? (a) many paths for current (b) a single current path (c) one out, the rest glow (d) each gets the full volts
25. 25.💡 2 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
26. 26.💡 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
27. 27.💡 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 1 glow? (a) Yes (b) No
28. 28.Which of these is true of a series circuit? (a) own switch for each bulb (b) each gets the full volts (c) a break stops every bulb (d) used in house wiring
29. 29.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
30. 30.Which of these is true of a series circuit? (a) bulbs share the voltage (b) used in house wiring (c) own switch for each bulb (d) many paths for current
31. 31.💡 5 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?
32. 32.💡 2 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
33. 33.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
34. 34.💡 3 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
35. 35.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
36. 36.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
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.💡 3 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
39. 39.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) bulbs share the voltage (c) a single current path (d) used in house wiring
40. 40.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True

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