Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 317 · 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 save copper only (c) to make bulbs dim (d) so all go off together
2. 2.💡 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
3. 3.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they all go out (c) they explode (d) they get dimmer
4. 4.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
5. 5.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
6. 6.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
7. 7.Which of these is true of a series circuit? (a) each gets the full volts (b) many paths for current (c) one out, the rest glow (d) a single current path
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. Bulb 1 is taken out of its holder. How many bulbs glow?
9. 9.💡 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?
10. 10.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
11. 11.💡 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?
12. 12.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
13. 13.Which of these is true of a series circuit? (a) one bulb out, all go out (b) used in house wiring (c) one out, the rest glow (d) many paths for current
14. 14.💡 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
15. 15.💡 2 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
16. 16.Which of these is true of a parallel circuit? (a) many paths for current (b) a single current path (c) one bulb out, all go out (d) a break stops every bulb
17. 17.Which of these is true of a series circuit? (a) own switch for each bulb (b) bulbs share the voltage (c) one out, the rest glow (d) used in house wiring
18. 18.💡 4 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
19. 19.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
20. 20.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
21. 21.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
22. 22.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) one out, the rest glow
23. 23.Which of these is true of a parallel circuit? (a) own switch for each bulb (b) a single current path (c) one bulb out, all go out (d) bulbs share the voltage
24. 24.💡 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. All the bulbs are in place. Does bulb 4 glow? (a) Yes (b) No
25. 25.True or false: “a single current path” is true of a series circuit. (a) False (b) True
26. 26.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one bulb out, all go out (c) each gets the full volts (d) a break stops every bulb
27. 27.💡 6 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?
28. 28.💡 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?
29. 29.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
30. 30.💡 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?
31. 31.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
32. 32.💡 4 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
33. 33.💡 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) brighter (c) the same
34. 34.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
35. 35.💡 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 1 and 4 are taken out of their holders. Does bulb 3 glow? (a) No (b) Yes
36. 36.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one bulb out, all go out (c) used in house wiring (d) a single current path
37. 37.💡 5 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
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.💡 3 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
40. 40.💡 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

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