Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 102 · 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: “one bulb out, all go out” 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.💡 5 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
4. 4.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
5. 5.Which of these is true of a parallel circuit? (a) a single current path (b) bulbs share the voltage (c) a break stops every bulb (d) each gets the full volts
6. 6.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they keep glowing (c) they all go out (d) they explode
7. 7.💡 4 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
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.💡 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?
10. 10.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one bulb out, all go out (c) bulbs share the voltage (d) many paths for current
11. 11.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
12. 12.💡 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. How many bulbs glow?
13. 13.💡 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 4 is taken out of its holder. How many bulbs glow?
14. 14.💡 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
15. 15.💡 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
16. 16.Which of these is true of a series circuit? (a) used in house wiring (b) many paths for current (c) a single current path (d) one out, the rest glow
17. 17.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) own switch for each bulb (c) a single current path (d) a break stops every bulb
18. 18.💡 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. How many bulbs glow?
19. 19.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
20. 20.💡 6 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
21. 21.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
22. 22.Which of these is true of a series circuit? (a) one out, the rest glow (b) each gets the full volts (c) many paths for current (d) one bulb out, all go out
23. 23.💡 4 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?
24. 24.💡 6 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
25. 25.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they explode (c) they keep glowing (d) they all go out
26. 26.💡 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?
27. 27.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
28. 28.Which of these is true of a series circuit? (a) own switch for each bulb (b) a break stops every bulb (c) many paths for current (d) one out, the rest glow
29. 29.💡 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 4 and 5 are taken out of their holders. How many bulbs glow?
30. 30.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) a single current path (c) one out, the rest glow (d) one bulb out, all go out
31. 31.Which of these is true of a series circuit? (a) bulbs share the voltage (b) used in house wiring (c) each gets the full volts (d) own switch for each bulb
32. 32.💡 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?
33. 33.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
34. 34.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
35. 35.💡 4 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
36. 36.💡 6 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
37. 37.💡 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?
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: “many paths for current” is true of a series circuit. (a) False (b) True
40. 40.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True

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