Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 303 · 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: “own switch for each bulb” is true of a series circuit. (a) False (b) True
2. 2.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they keep glowing (d) they get dimmer
3. 3.💡 3 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
4. 4.💡 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?
5. 5.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
6. 6.Which of these is true of a series circuit? (a) used in house wiring (b) a single current path (c) own switch for each bulb (d) each gets the full volts
7. 7.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) one bulb out, all go out
8. 8.💡 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
9. 9.Which of these is true of a parallel circuit? (a) many paths for current (b) one bulb out, all go out (c) a single current path (d) bulbs share the voltage
10. 10.💡 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
11. 11.💡 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) brighter (c) dimmer
12. 12.💡 3 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
13. 13.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
14. 14.💡 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?
15. 15.💡 6 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
16. 16.💡 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
17. 17.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
18. 18.Which of these is true of a series circuit? (a) many paths for current (b) own switch for each bulb (c) one bulb out, all go out (d) each gets the full volts
19. 19.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
20. 20.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
21. 21.Which of these is true of a series circuit? (a) one out, the rest glow (b) each gets the full volts (c) used in house wiring (d) bulbs share the voltage
22. 22.💡 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?
23. 23.Which of these is true of a series circuit? (a) a break stops every bulb (b) each gets the full volts (c) used in house wiring (d) own switch for each bulb
24. 24.💡 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) the same (c) brighter
25. 25.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) own switch for each bulb (c) a break stops every bulb (d) one bulb out, all go out
26. 26.💡 2 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
27. 27.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
28. 28.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
29. 29.💡 5 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?
30. 30.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
31. 31.💡 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?
32. 32.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
33. 33.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
34. 34.💡 3 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
35. 35.💡 2 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
36. 36.💡 5 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
37. 37.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
38. 38.💡 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?
39. 39.💡 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?
40. 40.💡 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. Does bulb 4 glow? (a) No (b) Yes

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