Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 41 · 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.Which of these is true of a parallel circuit? (a) each gets the full volts (b) a single current path (c) a break stops every bulb (d) bulbs share the voltage
2. 2.Which of these is true of a series circuit? (a) used in house wiring (b) each gets the full volts (c) many paths for current (d) one bulb out, all go out
3. 3.💡 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 4 and 6 are taken out of their holders. How many bulbs glow?
4. 4.💡 6 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
5. 5.Which of these is true of a series circuit? (a) own switch for each bulb (b) used in house wiring (c) one out, the rest glow (d) bulbs share the voltage
6. 6.💡 3 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
7. 7.True or false: “a single current path” is true of a series circuit. (a) False (b) True
8. 8.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they keep glowing (c) they all go out (d) they get dimmer
9. 9.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
10. 10.Which of these is true of a parallel circuit? (a) a single current path (b) bulbs share the voltage (c) one bulb out, all go out (d) own switch for each bulb
11. 11.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
12. 12.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
13. 13.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
14. 14.💡 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
15. 15.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
16. 16.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
17. 17.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) so all go off together (d) each gets full voltage
18. 18.💡 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
19. 19.💡 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
20. 20.Which of these is true of a series circuit? (a) each gets the full volts (b) many paths for current (c) a break stops every bulb (d) used in house wiring
21. 21.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
22. 22.Which of these is true of a parallel circuit? (a) a single current path (b) many paths for current (c) a break stops every bulb (d) bulbs share the voltage
23. 23.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a break stops every bulb (c) bulbs share the voltage (d) used in house wiring
24. 24.Which of these is true of a series circuit? (a) own switch for each bulb (b) one out, the rest glow (c) many paths for current (d) a single current path
25. 25.💡 2 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
26. 26.💡 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?
27. 27.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
28. 28.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
29. 29.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
30. 30.💡 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
31. 31.💡 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?
32. 32.💡 2 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
33. 33.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a break stops every bulb (c) one out, the rest glow (d) a single current path
34. 34.💡 4 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
35. 35.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
36. 36.💡 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 1 is taken out of its holder. Does bulb 3 glow? (a) Yes (b) No
37. 37.💡 5 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
38. 38.💡 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?
39. 39.💡 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 4 is taken out of its holder. How many bulbs glow?
40. 40.💡 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 4 are taken out of their holders. Does bulb 3 glow? (a) No (b) Yes

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