Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 163 · 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.💡 5 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
2. 2.💡 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?
3. 3.Which of these is true of a parallel circuit? (a) each gets the full volts (b) bulbs share the voltage (c) a break stops every bulb (d) a single current path
4. 4.💡 Why is house wiring done in parallel? (a) so all go off together (b) each gets full voltage (c) to make bulbs dim (d) to save copper only
5. 5.Which of these is true of a series circuit? (a) used in house wiring (b) own switch for each bulb (c) many paths for current (d) bulbs share the voltage
6. 6.💡 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 2 and 3 are taken out of their holders. How many bulbs glow?
7. 7.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
8. 8.Which of these is true of a parallel circuit? (a) used in house wiring (b) bulbs share the voltage (c) a single current path (d) one bulb out, all go out
9. 9.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they all go out (c) they get dimmer (d) they explode
10. 10.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
11. 11.💡 3 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
12. 12.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
13. 13.💡 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?
14. 14.💡 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?
15. 15.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
16. 16.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
17. 17.💡 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) Yes (b) No
18. 18.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
19. 19.💡 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) Yes (b) No
20. 20.💡 5 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
21. 21.Which of these is true of a parallel circuit? (a) own switch for each bulb (b) a single current path (c) a break stops every bulb (d) bulbs share the voltage
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) brighter (c) the same
23. 23.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
24. 24.💡 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?
25. 25.💡 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?
26. 26.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
27. 27.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) bulbs share the voltage (c) one out, the rest glow (d) one bulb out, all go out
28. 28.💡 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 2 and 3 are taken out of their holders. How many bulbs glow?
29. 29.💡 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?
30. 30.💡 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?
31. 31.💡 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
32. 32.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
33. 33.Which of these is true of a series circuit? (a) many paths for current (b) each gets the full volts (c) a break stops every bulb (d) used in house wiring
34. 34.💡 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) dimmer (c) the same
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.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one bulb out, all go out (c) many paths for current (d) a single current path
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: “many paths for current” is true of a parallel circuit. (a) False (b) True
39. 39.💡 6 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
40. 40.True or false: “many paths for current” is true of a series circuit. (a) True (b) False

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