Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 281 · 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.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
2. 2.💡 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?
3. 3.💡 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?
4. 4.Which of these is true of a series circuit? (a) many paths for current (b) used in house wiring (c) a single current path (d) one out, the rest glow
5. 5.Which of these is true of a series circuit? (a) used in house wiring (b) many paths for current (c) a break stops every bulb (d) each gets the full volts
6. 6.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
7. 7.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
8. 8.💡 4 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
9. 9.True or false: “a single current path” is true of a series circuit. (a) True (b) False
10. 10.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a break stops every bulb (c) many paths for current (d) a single current path
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) dimmer (b) brighter (c) the same
12. 12.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) to make bulbs dim (d) each gets full voltage
13. 13.💡 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?
14. 14.💡 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
15. 15.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
16. 16.💡 4 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
17. 17.💡 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
18. 18.💡 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. Does bulb 1 glow? (a) No (b) Yes
19. 19.Which of these is true of a parallel circuit? (a) a single current path (b) bulbs share the voltage (c) each gets the full volts (d) a break stops every bulb
20. 20.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
21. 21.💡 2 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
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) dimmer (b) brighter (c) the same
23. 23.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) used in house wiring (c) a break stops every bulb (d) a single current path
24. 24.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
25. 25.💡 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?
26. 26.💡 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
27. 27.Which of these is true of a series circuit? (a) each gets the full volts (b) bulbs share the voltage (c) used in house wiring (d) one out, the rest glow
28. 28.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
29. 29.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
30. 30.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
31. 31.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
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. Bulbs 1 and 5 are taken out of their holders. How many bulbs glow?
33. 33.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
34. 34.Which of these is true of a series circuit? (a) many paths for current (b) each gets the full volts (c) one bulb out, all go out (d) one out, the rest glow
35. 35.💡 4 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
36. 36.💡 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
37. 37.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
38. 38.💡 2 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
39. 39.💡 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?
40. 40.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False

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