Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 128 · 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.💡 A battery lights 4 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
2. 2.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to save copper only (c) so all go off together (d) to make bulbs dim
3. 3.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
4. 4.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
5. 5.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they all go out (c) they get dimmer (d) they keep glowing
6. 6.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) one bulb out, all go out
7. 7.💡 5 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
8. 8.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
9. 9.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
10. 10.💡 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?
11. 11.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) used in house wiring (c) one bulb out, all go out (d) a break stops every bulb
12. 12.💡 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. How many bulbs glow?
13. 13.💡 3 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
14. 14.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
15. 15.💡 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?
16. 16.💡 5 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
17. 17.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
18. 18.💡 6 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
19. 19.True or false: “a single current path” is true of a series circuit. (a) False (b) True
20. 20.💡 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?
21. 21.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
22. 22.💡 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 2 are taken out of their holders. How many bulbs glow?
23. 23.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one bulb out, all go out (c) one out, the rest glow (d) a break stops every bulb
24. 24.Which of these is true of a series circuit? (a) each gets the full volts (b) many paths for current (c) bulbs share the voltage (d) own switch for each bulb
25. 25.True or false: “many paths for current” 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.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
28. 28.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
29. 29.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
30. 30.Which of these is true of a parallel circuit? (a) many paths for current (b) a single current path (c) one bulb out, all go out (d) bulbs share the voltage
31. 31.💡 A battery lights 2 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.Which of these is true of a series circuit? (a) one bulb out, all go out (b) many paths for current (c) one out, the rest glow (d) used in house wiring
33. 33.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
34. 34.💡 3 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
35. 35.Which of these is true of a series circuit? (a) a single current path (b) each gets the full volts (c) used in house wiring (d) many paths for current
36. 36.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
37. 37.💡 2 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
38. 38.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
39. 39.💡 A battery lights 3 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
40. 40.Which of these is true of a series circuit? (a) a break stops every bulb (b) many paths for current (c) used in house wiring (d) one out, the rest glow

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