Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 199 · 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 series circuit? (a) many paths for current (b) one out, the rest glow (c) a single current path (d) used in house wiring
2. 2.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) each gets the full volts (c) one bulb out, all go out (d) a single current path
3. 3.Which of these is true of a series circuit? (a) a break stops every bulb (b) many paths for current (c) own switch for each bulb (d) one out, the rest glow
4. 4.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
5. 5.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they get dimmer (c) they all go out (d) they explode
6. 6.💡 A battery lights 2 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
7. 7.💡 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?
8. 8.💡 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) brighter (c) dimmer
9. 9.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
10. 10.💡 Why is house wiring done in parallel? (a) to save copper only (b) each gets full voltage (c) so all go off together (d) to make bulbs dim
11. 11.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
12. 12.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a break stops every bulb (c) a single current path (d) used in house wiring
13. 13.💡 A battery lights 4 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
14. 14.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one bulb out, all go out (c) one out, the rest glow (d) a single current path
15. 15.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
16. 16.💡 5 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
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 5 is taken out of its holder. Does bulb 4 glow? (a) Yes (b) No
18. 18.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) many paths for current (c) a break stops every bulb (d) a single current path
19. 19.💡 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 5 is taken out of its holder. Does bulb 4 glow? (a) No (b) Yes
20. 20.Which of these is true of a series circuit? (a) own switch for each bulb (b) many paths for current (c) bulbs share the voltage (d) one out, the rest glow
21. 21.💡 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?
22. 22.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
23. 23.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
24. 24.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
25. 25.💡 2 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
26. 26.💡 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?
27. 27.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
28. 28.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
29. 29.💡 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. Does bulb 1 glow? (a) Yes (b) No
30. 30.💡 4 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
31. 31.💡 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. Bulbs 1 and 4 are taken out of their holders. Does bulb 3 glow? (a) No (b) Yes
32. 32.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
33. 33.💡 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. Bulbs 1 and 2 are taken out of their holders. How many bulbs glow?
34. 34.💡 4 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?
35. 35.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
36. 36.True or false: “a single current path” is true of a series circuit. (a) False (b) True
37. 37.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
38. 38.💡 2 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
39. 39.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
40. 40.💡 5 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =

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