Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 138 · 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.💡 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. All the bulbs are in place. Does bulb 3 glow? (a) No (b) Yes
2. 2.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
3. 3.💡 Why is house wiring done in parallel? (a) so all go off together (b) each gets full voltage (c) to make bulbs dim (d) to save copper only
4. 4.💡 3 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?
5. 5.💡 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 3 are taken out of their holders. How many bulbs glow?
6. 6.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
7. 7.💡 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?
8. 8.💡 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?
9. 9.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they get dimmer (c) they keep glowing (d) they explode
10. 10.💡 2 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
11. 11.💡 4 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
12. 12.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
13. 13.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a break stops every bulb (c) one bulb out, all go out (d) used in house wiring
14. 14.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
15. 15.Which of these is true of a series circuit? (a) one out, the rest glow (b) own switch for each bulb (c) many paths for current (d) bulbs share the voltage
16. 16.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) bulbs share the voltage (c) a single current path (d) many paths for current
17. 17.💡 5 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
18. 18.True or false: “a single current path” is true of a series circuit. (a) True (b) False
19. 19.💡 5 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
20. 20.💡 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 4 are taken out of their holders. Does bulb 2 glow? (a) Yes (b) No
21. 21.💡 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 1 and 4 are taken out of their holders. How many bulbs glow?
22. 22.💡 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
23. 23.💡 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?
24. 24.💡 2 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
25. 25.💡 6 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?
26. 26.💡 5 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
27. 27.💡 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. Does bulb 2 glow? (a) Yes (b) No
28. 28.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one bulb out, all go out (c) own switch for each bulb (d) a single current path
29. 29.💡 5 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
30. 30.💡 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?
31. 31.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a break stops every bulb (c) a single current path (d) each gets the full volts
32. 32.💡 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 2 is taken out of its holder. Does bulb 4 glow? (a) No (b) Yes
33. 33.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
34. 34.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
35. 35.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
36. 36.💡 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 2 and 5 are taken out of their holders. Does bulb 1 glow? (a) Yes (b) No
37. 37.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) one out, the rest glow (c) a break stops every bulb (d) bulbs share the voltage
38. 38.💡 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) the same (c) dimmer
39. 39.Which of these is true of a series circuit? (a) used in house wiring (b) own switch for each bulb (c) one out, the rest glow (d) one bulb out, all go out
40. 40.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True

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