Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 266 · 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.💡 4 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
2. 2.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
3. 3.💡 5 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
4. 4.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
5. 5.Which of these is true of a parallel circuit? (a) each gets the full volts (b) bulbs share the voltage (c) one bulb out, all go out (d) a break stops every bulb
6. 6.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
7. 7.💡 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
8. 8.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they explode (c) they all go out (d) they keep glowing
9. 9.Which of these is true of a series circuit? (a) used in house wiring (b) one out, the rest glow (c) many paths for current (d) bulbs share the voltage
10. 10.Which of these is true of a parallel circuit? (a) one out, the rest glow (b) one bulb out, all go out (c) a single current path (d) bulbs share the voltage
11. 11.💡 A battery lights 5 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
12. 12.💡 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?
13. 13.Which of these is true of a series circuit? (a) a single current path (b) many paths for current (c) one out, the rest glow (d) each gets the full volts
14. 14.💡 5 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
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.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
17. 17.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a single current path (c) many paths for current (d) one bulb out, all go out
18. 18.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
19. 19.💡 2 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
20. 20.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
21. 21.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
22. 22.💡 4 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
23. 23.💡 3 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
24. 24.💡 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 1 and 3 are taken out of their holders. How many bulbs glow?
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 bulb has its own switch on its path. 5 of the switches are OFF and the rest are ON. How many bulbs glow?
27. 27.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
28. 28.Which of these is true of a series circuit? (a) one bulb out, all go out (b) many paths for current (c) each gets the full volts (d) one out, the rest glow
29. 29.💡 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) dimmer (c) brighter
30. 30.💡 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 2 is taken out of its holder. How many bulbs glow?
31. 31.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
32. 32.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
33. 33.💡 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?
34. 34.💡 2 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
35. 35.💡 A battery lights 3 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
36. 36.💡 5 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
37. 37.💡 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. How many bulbs glow?
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.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
40. 40.True or false: “a single current path” is true of a series circuit. (a) False (b) True

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