Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 125 · 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.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
2. 2.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a single current path (c) bulbs share the voltage (d) each gets the full volts
3. 3.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) so all go off together (c) each gets full voltage (d) to save copper only
4. 4.Which of these is true of a series circuit? (a) own switch for each bulb (b) used in house wiring (c) many paths for current (d) one bulb out, all go out
5. 5.💡 3 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
6. 6.💡 A battery lights 4 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
7. 7.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
8. 8.Which of these is true of a parallel circuit? (a) a single current path (b) a break stops every bulb (c) one out, the rest glow (d) bulbs share the voltage
9. 9.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
10. 10.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
11. 11.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) a single current path
12. 12.💡 6 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
13. 13.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
14. 14.💡 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 1 is taken out of its holder. Does bulb 2 glow? (a) Yes (b) No
15. 15.💡 3 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
16. 16.💡 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
17. 17.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
18. 18.💡 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) dimmer (c) brighter
19. 19.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they all go out (c) they get dimmer (d) they explode
20. 20.Which of these is true of a series circuit? (a) used in house wiring (b) each gets the full volts (c) one out, the rest glow (d) a break stops every bulb
21. 21.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) a single current path (c) one bulb out, all go out (d) used in house wiring
22. 22.Which of these is true of a series circuit? (a) many paths for current (b) own switch for each bulb (c) used in house wiring (d) bulbs share the voltage
23. 23.💡 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?
24. 24.💡 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?
25. 25.💡 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 6 is taken out of its holder. How many bulbs glow?
26. 26.💡 3 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
27. 27.💡 5 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
28. 28.💡 4 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
29. 29.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
30. 30.💡 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 4 are taken out of their holders. How many bulbs glow?
31. 31.💡 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. Bulb 1 is taken out of its holder. How many bulbs glow?
32. 32.Which of these is true of a parallel circuit? (a) many paths for current (b) a single current path (c) a break stops every bulb (d) bulbs share the voltage
33. 33.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
34. 34.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
35. 35.💡 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. Bulb 2 is taken out of its holder. How many bulbs glow?
36. 36.💡 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?
37. 37.💡 4 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
38. 38.💡 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 1 is taken out of its holder. Does bulb 4 glow? (a) Yes (b) No
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. Bulbs 3 and 4 are taken out of their holders. Does bulb 2 glow? (a) No (b) Yes
40. 40.💡 5 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =

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