Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 294 · 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.Which of these is true of a series circuit? (a) one out, the rest glow (b) a single current path (c) own switch for each bulb (d) many paths for current
3. 3.Which of these is true of a series circuit? (a) one bulb out, all go out (b) own switch for each bulb (c) each gets the full volts (d) one out, the rest glow
4. 4.💡 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?
5. 5.💡 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 3 and 4 are taken out of their holders. How many bulbs glow?
6. 6.💡 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?
7. 7.💡 3 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
8. 8.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
9. 9.Which of these is true of a parallel circuit? (a) one out, the rest glow (b) bulbs share the voltage (c) a break stops every bulb (d) a single current path
10. 10.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
11. 11.💡 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. Bulbs 2 and 3 are taken out of their holders. How many bulbs glow?
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) dimmer (b) brighter (c) the same
13. 13.💡 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?
14. 14.Which of these is true of a parallel circuit? (a) own switch for each bulb (b) a break stops every bulb (c) bulbs share the voltage (d) one bulb out, all go out
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. Bulb 3 is taken out of its holder. How many bulbs glow?
16. 16.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) each gets full voltage (c) to save copper only (d) so all go off together
17. 17.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they all go out (c) they keep glowing (d) they get dimmer
18. 18.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
19. 19.💡 4 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
20. 20.💡 5 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
21. 21.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
22. 22.💡 4 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
23. 23.Which of these is true of a series circuit? (a) own switch for each bulb (b) bulbs share the voltage (c) each gets the full volts (d) used in house wiring
24. 24.Which of these is true of a parallel circuit? (a) used in house wiring (b) a single current path (c) bulbs share the voltage (d) one bulb out, all go out
25. 25.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
26. 26.💡 6 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
27. 27.💡 6 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?
28. 28.💡 2 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
29. 29.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
30. 30.💡 4 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
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. Bulb 4 is taken out of its holder. How many bulbs glow?
32. 32.💡 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?
33. 33.💡 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) the same (c) brighter
34. 34.💡 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 1 and 3 are taken out of their holders. How many bulbs glow?
35. 35.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) a single current path (c) each gets the full volts (d) one bulb out, all go out
36. 36.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
37. 37.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
38. 38.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
39. 39.Which of these is true of a series circuit? (a) many paths for current (b) a break stops every bulb (c) used in house wiring (d) one out, the rest glow
40. 40.💡 5 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =

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