Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 50 · 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 parallel circuit? (a) a single current path (b) one bulb out, all go out (c) bulbs share the voltage (d) own switch for each bulb
2. 2.Which of these is true of a series circuit? (a) own switch for each bulb (b) used in house wiring (c) many paths for current (d) bulbs share the voltage
3. 3.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
4. 4.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they get dimmer (c) they all go out (d) they keep glowing
5. 5.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) each gets the full volts
6. 6.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
7. 7.True or false: “a single current path” is true of a series circuit. (a) False (b) True
8. 8.💡 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 4 is taken out of its holder. How many bulbs glow?
9. 9.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
10. 10.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a break stops every bulb (c) bulbs share the voltage (d) one out, the rest glow
11. 11.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
12. 12.Which of these is true of a series circuit? (a) a break stops every bulb (b) used in house wiring (c) many paths for current (d) own switch for each bulb
13. 13.💡 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
14. 14.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
15. 15.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
16. 16.💡 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?
17. 17.💡 4 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
18. 18.💡 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
19. 19.💡 4 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
20. 20.💡 5 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?
21. 21.💡 5 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
22. 22.Which of these is true of a series circuit? (a) one out, the rest glow (b) many paths for current (c) one bulb out, all go out (d) own switch for each bulb
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. Does bulb 4 glow? (a) No (b) Yes
24. 24.💡 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. How many bulbs glow?
25. 25.💡 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?
26. 26.💡 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 1 is taken out of its holder. Does bulb 2 glow? (a) No (b) Yes
27. 27.💡 4 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
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 2 is taken out of its holder. How many bulbs glow?
29. 29.💡 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 6 are taken out of their holders. Does bulb 2 glow? (a) Yes (b) No
30. 30.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
31. 31.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
32. 32.💡 3 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
33. 33.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
34. 34.💡 2 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
35. 35.💡 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?
36. 36.💡 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 4 is taken out of its holder. Does bulb 5 glow? (a) No (b) Yes
37. 37.💡 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?
38. 38.💡 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 3 are taken out of their holders. Does bulb 2 glow? (a) Yes (b) No
39. 39.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
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) dimmer (b) brighter (c) the same

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