Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 155 · 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: “many paths for current” is true of a parallel circuit. (a) True (b) False
2. 2.💡 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
3. 3.💡 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
4. 4.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
5. 5.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a single current path (c) bulbs share the voltage (d) own switch for each bulb
6. 6.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
7. 7.💡 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
8. 8.Which of these is true of a series circuit? (a) a single current path (b) one out, the rest glow (c) many paths for current (d) each gets the full volts
9. 9.💡 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
10. 10.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
11. 11.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
12. 12.💡 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
13. 13.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
14. 14.Which of these is true of a parallel circuit? (a) one out, the rest glow (b) bulbs share the voltage (c) one bulb out, all go out (d) a single current path
15. 15.💡 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?
16. 16.💡 4 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
17. 17.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
18. 18.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
19. 19.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
20. 20.💡 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?
21. 21.💡 5 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?
22. 22.💡 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 3 is taken out of its holder. How many bulbs glow?
23. 23.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
24. 24.💡 2 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
25. 25.💡 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. How many bulbs glow?
26. 26.💡 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?
27. 27.💡 3 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
28. 28.💡 3 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
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. Bulb 2 is taken out of its holder. Does bulb 1 glow? (a) No (b) Yes
30. 30.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
31. 31.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
32. 32.Which of these is true of a series circuit? (a) own switch for each bulb (b) one out, the rest glow (c) each gets the full volts (d) a break stops every bulb
33. 33.Which of these is true of a series circuit? (a) own switch for each bulb (b) each gets the full volts (c) bulbs share the voltage (d) one out, the rest 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.Which of these is true of a series circuit? (a) used in house wiring (b) one bulb out, all go out (c) one out, the rest glow (d) each gets the full volts
36. 36.💡 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?
37. 37.💡 6 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
38. 38.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
39. 39.💡 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?
40. 40.💡 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 3 is taken out of its holder. How many bulbs glow?

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