Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 302 · 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.💡 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?
2. 2.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
3. 3.💡 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 1 glow? (a) Yes (b) No
4. 4.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) each gets full voltage (c) so all go off together (d) to save copper only
5. 5.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
6. 6.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they all go out (c) they keep glowing (d) they get dimmer
7. 7.Which of these is true of a series circuit? (a) own switch for each bulb (b) one bulb out, all go out (c) one out, the rest glow (d) many paths for current
8. 8.💡 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 1 and 3 are taken out of their holders. Does bulb 2 glow? (a) No (b) Yes
9. 9.💡 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?
10. 10.💡 3 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
11. 11.💡 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. Bulb 2 is taken out of its holder. How many bulbs glow?
12. 12.💡 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?
13. 13.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
14. 14.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
15. 15.💡 5 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
16. 16.💡 3 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
17. 17.💡 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?
18. 18.💡 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 3 glow? (a) No (b) Yes
19. 19.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
20. 20.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
21. 21.💡 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 2 and 3 are taken out of their holders. How many bulbs glow?
22. 22.💡 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
23. 23.💡 2 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
24. 24.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) a single current path (c) used in house wiring (d) bulbs share the voltage
25. 25.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
26. 26.💡 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?
27. 27.💡 3 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.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
29. 29.Which of these is true of a series circuit? (a) own switch for each bulb (b) used in house wiring (c) a single current path (d) many paths for current
30. 30.💡 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
31. 31.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
32. 32.💡 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?
33. 33.💡 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) the same (c) brighter
34. 34.💡 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?
35. 35.True or false: “a single current path” is true of a series circuit. (a) True (b) False
36. 36.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) many paths for current (c) a single current path (d) one bulb out, all go out
37. 37.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
38. 38.💡 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 4 and 5 are taken out of their holders. Does bulb 3 glow? (a) No (b) Yes
39. 39.💡 2 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
40. 40.Which of these is true of a series circuit? (a) many paths for current (b) own switch for each bulb (c) bulbs share the voltage (d) one out, the rest glow

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