Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 171 · 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) one out, the rest glow (b) a break stops every bulb (c) many paths for current (d) own switch for each bulb
2. 2.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
3. 3.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) each gets full voltage (d) so all go off together
4. 4.💡 2 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
5. 5.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they keep glowing (c) they get dimmer (d) they all go out
6. 6.💡 5 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
7. 7.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
8. 8.💡 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?
9. 9.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
10. 10.💡 3 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
11. 11.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
12. 12.💡 5 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: “used in house wiring” is true of a series circuit. (a) False (b) True
14. 14.💡 6 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.💡 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?
16. 16.Which of these is true of a parallel circuit? (a) one out, the rest glow (b) bulbs share the voltage (c) a break stops every bulb (d) one bulb out, all go out
17. 17.Which of these is true of a series circuit? (a) own switch for each bulb (b) used in house wiring (c) each gets the full volts (d) bulbs share the voltage
18. 18.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
19. 19.Which of these is true of a series circuit? (a) one bulb out, all go out (b) one out, the rest glow (c) used in house wiring (d) each gets the full volts
20. 20.Which of these is true of a series circuit? (a) own switch for each bulb (b) each gets the full volts (c) many paths for current (d) a single current path
21. 21.💡 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) Yes (b) No
22. 22.💡 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 5 are taken out of their holders. How many bulbs glow?
23. 23.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
24. 24.True or false: “a single current path” is true of a series circuit. (a) False (b) True
25. 25.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
26. 26.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
27. 27.💡 3 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?
28. 28.Which of these is true of a parallel circuit? (a) a single current path (b) one bulb out, all go out (c) each gets the full volts (d) bulbs share the voltage
29. 29.Which of these is true of a parallel circuit? (a) a single current path (b) bulbs share the voltage (c) a break stops every bulb (d) own switch for each bulb
30. 30.💡 6 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
31. 31.💡 3 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. Does bulb 1 glow? (a) No (b) Yes
32. 32.💡 4 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
33. 33.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
34. 34.💡 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?
35. 35.💡 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
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) brighter (b) the same (c) dimmer
37. 37.💡 4 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
38. 38.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
39. 39.💡 3 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
40. 40.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False

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