Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 38 · 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) many paths for current (b) a break stops every bulb (c) used in house wiring (d) one out, the rest glow
2. 2.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
3. 3.💡 6 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?
4. 4.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
5. 5.💡 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?
6. 6.💡 A battery lights 3 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
7. 7.Which of these is true of a series circuit? (a) own switch for each bulb (b) bulbs share the voltage (c) each gets the full volts (d) many paths for current
8. 8.💡 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
9. 9.💡 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 5 is taken out of its holder. How many bulbs glow?
10. 10.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
11. 11.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
12. 12.💡 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?
13. 13.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
14. 14.💡 4 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
15. 15.💡 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
16. 16.Which of these is true of a parallel circuit? (a) own switch for each bulb (b) a break stops every bulb (c) one bulb out, all go out (d) a single current path
17. 17.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
18. 18.💡 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) brighter (c) the same
19. 19.💡 5 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
20. 20.💡 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?
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. Bulb 2 is taken out of its holder. Does bulb 3 glow? (a) Yes (b) No
22. 22.💡 2 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
23. 23.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
24. 24.💡 Why is house wiring done in parallel? (a) to save copper only (b) so all go off together (c) to make bulbs dim (d) each gets full voltage
25. 25.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
26. 26.💡 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 5 and 6 are taken out of their holders. Does bulb 1 glow? (a) Yes (b) No
27. 27.💡 2 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
28. 28.💡 5 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
29. 29.💡 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?
30. 30.💡 5 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
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. Does bulb 2 glow? (a) Yes (b) No
32. 32.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
33. 33.💡 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?
34. 34.True or false: “a single current path” is true of a series circuit. (a) False (b) True
35. 35.💡 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 4 is taken out of its holder. Does bulb 1 glow? (a) Yes (b) No
36. 36.💡 5 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
37. 37.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) a break stops every bulb
38. 38.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one bulb out, all go out (c) a single current path (d) each gets the full volts
39. 39.Which of these is true of a series circuit? (a) used in house wiring (b) a single current path (c) one out, the rest glow (d) own switch for each bulb
40. 40.Which of these is true of a series circuit? (a) own switch for each bulb (b) one bulb out, all go out (c) many paths for current (d) each gets the full volts

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