Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 225 · 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.💡 3 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
3. 3.💡 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?
4. 4.💡 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
5. 5.Which of these is true of a parallel circuit? (a) a single current path (b) many paths for current (c) one bulb out, all go out (d) bulbs share the voltage
6. 6.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
7. 7.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to make bulbs dim (c) to save copper only (d) so all go off together
8. 8.Which of these is true of a series circuit? (a) many paths for current (b) used in house wiring (c) one bulb out, all go out (d) one out, the rest glow
9. 9.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
10. 10.💡 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?
11. 11.Which of these is true of a parallel circuit? (a) each gets the full volts (b) one bulb out, all go out (c) a single current path (d) a break stops every bulb
12. 12.💡 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?
13. 13.💡 2 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
14. 14.💡 2 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
15. 15.Which of these is true of a series circuit? (a) one out, the rest glow (b) many paths for current (c) a single current path (d) used in house wiring
16. 16.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they get dimmer (c) they explode (d) they keep glowing
17. 17.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) used in house wiring (c) a break stops every bulb (d) one bulb out, all go out
18. 18.💡 4 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
19. 19.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
20. 20.💡 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
21. 21.💡 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
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. Bulbs 3 and 4 are taken out of their holders. How many bulbs glow?
23. 23.True or false: “a single current path” is true of a series circuit. (a) False (b) True
24. 24.💡 4 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
25. 25.💡 5 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
26. 26.Which of these is true of a parallel circuit? (a) a single current path (b) a break stops every bulb (c) bulbs share the voltage (d) one out, the rest glow
27. 27.💡 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 1 is taken out of its holder. Does bulb 5 glow? (a) No (b) Yes
28. 28.💡 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
29. 29.💡 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?
30. 30.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
31. 31.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
32. 32.💡 4 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
33. 33.Which of these is true of a series circuit? (a) a break stops every bulb (b) one out, the rest glow (c) many paths for current (d) own switch for each bulb
34. 34.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
35. 35.💡 3 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
36. 36.💡 4 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
37. 37.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
38. 38.💡 2 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
39. 39.💡 3 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
40. 40.💡 5 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?

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