Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 230 · 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 series circuit? (a) a single current path (b) own switch for each bulb (c) each gets the full volts (d) one out, the rest glow
2. 2.Which of these is true of a parallel circuit? (a) many paths for current (b) a break stops every bulb (c) a single current path (d) one bulb out, all go out
3. 3.💡 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
4. 4.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) each gets full voltage (c) so all go off together (d) to save copper only
5. 5.💡 2 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
6. 6.💡 3 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
7. 7.💡 5 identical bulbs are joined in parallel across a 4.5 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.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
10. 10.💡 5 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?
11. 11.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
12. 12.💡 3 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
13. 13.💡 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. Does bulb 1 glow? (a) Yes (b) No
14. 14.💡 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?
15. 15.💡 6 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
16. 16.💡 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?
17. 17.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they keep glowing (c) they get dimmer (d) they all go out
18. 18.💡 4 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
19. 19.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a single current path (c) own switch for each bulb (d) bulbs share the voltage
20. 20.Which of these is true of a series circuit? (a) one out, the rest glow (b) used in house wiring (c) many paths for current (d) one bulb out, all go out
21. 21.💡 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 1 is taken out of its holder. Does bulb 3 glow? (a) Yes (b) No
22. 22.💡 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
23. 23.Which of these is true of a series circuit? (a) one out, the rest glow (b) many paths for current (c) a break stops every bulb (d) own switch for each bulb
24. 24.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
25. 25.💡 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?
26. 26.Which of these is true of a series circuit? (a) used in house wiring (b) each gets the full volts (c) bulbs share the voltage (d) one out, the rest glow
27. 27.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
28. 28.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
29. 29.Which of these is true of a parallel circuit? (a) a single current path (b) used in house wiring (c) bulbs share the voltage (d) one bulb out, all go out
30. 30.💡 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 2 is taken out of its holder. Does bulb 3 glow? (a) No (b) Yes
31. 31.True or false: “a single current path” is true of a series circuit. (a) False (b) True
32. 32.💡 5 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
33. 33.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
34. 34.💡 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 1 and 4 are taken out of their holders. Does bulb 3 glow? (a) Yes (b) No
35. 35.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
36. 36.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
37. 37.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
38. 38.💡 4 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
39. 39.💡 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?
40. 40.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one out, the rest glow (c) a single current path (d) a break stops every bulb

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