Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 76 · 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.💡 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 1 is taken out of its holder. Does bulb 2 glow? (a) No (b) Yes
2. 2.Which of these is true of a series circuit? (a) each gets the full volts (b) used in house wiring (c) one bulb out, all go out (d) one out, the rest glow
3. 3.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) bulbs share the voltage (c) each gets the full volts (d) a single current path
4. 4.💡 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
5. 5.💡 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 2 are taken out of their holders. How many bulbs glow?
6. 6.💡 Why is house wiring done in parallel? (a) to save copper only (b) so all go off together (c) each gets full voltage (d) to make bulbs dim
7. 7.💡 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?
8. 8.Which of these is true of a series circuit? (a) one out, the rest glow (b) used in house wiring (c) each gets the full volts (d) bulbs share the voltage
9. 9.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
10. 10.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
11. 11.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
12. 12.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) own switch for each bulb (c) bulbs share the voltage (d) a break stops every bulb
13. 13.Which of these is true of a series circuit? (a) own switch for each bulb (b) many paths for current (c) each gets the full volts (d) a single current path
14. 14.💡 3 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
15. 15.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
16. 16.💡 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 4 is taken out of its holder. Does bulb 1 glow? (a) No (b) Yes
17. 17.Which of these is true of a parallel circuit? (a) a single current path (b) one bulb out, all go out (c) used in house wiring (d) bulbs share the voltage
18. 18.True or false: “a single current path” is true of a series circuit. (a) False (b) True
19. 19.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they get dimmer (c) they explode (d) they keep glowing
20. 20.Which of these is true of a series circuit? (a) used in house wiring (b) one out, the rest glow (c) each gets the full volts (d) a break stops every bulb
21. 21.💡 3 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
22. 22.💡 3 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
23. 23.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
24. 24.💡 2 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
25. 25.💡 5 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
26. 26.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) many paths for current
27. 27.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
28. 28.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
29. 29.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
30. 30.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
31. 31.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
32. 32.💡 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. All the bulbs are in place. How many bulbs glow?
33. 33.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
34. 34.💡 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?
35. 35.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a single current path (c) one out, the rest glow (d) one bulb out, all go out
36. 36.💡 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) the same (c) brighter
37. 37.💡 A battery lights 2 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
38. 38.💡 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?
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. Bulb 1 is taken out of its holder. How many bulbs glow?
40. 40.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False

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