Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 131 · 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.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
2. 2.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
3. 3.💡 Why is house wiring done in parallel? (a) to save copper only (b) so all go off together (c) each gets full voltage (d) to make bulbs dim
4. 4.💡 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. How many bulbs glow?
5. 5.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they keep glowing (c) they get dimmer (d) they explode
6. 6.💡 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
7. 7.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
8. 8.Which of these is true of a series circuit? (a) one out, the rest glow (b) own switch for each bulb (c) used in house wiring (d) one bulb out, all go out
9. 9.💡 2 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
10. 10.💡 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?
11. 11.💡 A battery lights 4 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
12. 12.Which of these is true of a series circuit? (a) one out, the rest glow (b) used in house wiring (c) many paths for current (d) a break stops every bulb
13. 13.True or false: “a single current path” is true of a series circuit. (a) False (b) True
14. 14.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
15. 15.💡 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?
16. 16.💡 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 2 is taken out of its holder. Does bulb 1 glow? (a) No (b) Yes
17. 17.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
18. 18.💡 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?
19. 19.💡 4 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
20. 20.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
21. 21.Which of these is true of a series circuit? (a) many paths for current (b) each gets the full volts (c) own switch for each bulb (d) a single current path
22. 22.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a single current path (c) one out, the rest glow (d) a break stops every bulb
23. 23.💡 6 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
24. 24.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
25. 25.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
26. 26.Which of these is true of a parallel circuit? (a) many paths for current (b) one bulb out, all go out (c) bulbs share the voltage (d) a single current path
27. 27.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
28. 28.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
29. 29.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
30. 30.💡 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?
31. 31.💡 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. Does bulb 2 glow? (a) No (b) Yes
32. 32.💡 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?
33. 33.💡 2 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
34. 34.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
35. 35.💡 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?
36. 36.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
37. 37.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a single current path (c) used in house wiring (d) one bulb out, all go out
38. 38.💡 6 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
39. 39.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
40. 40.Which of these is true of a parallel circuit? (a) each gets the full volts (b) one bulb out, all go out (c) bulbs share the voltage (d) a break stops every bulb

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