Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 107 · 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. Bulbs 1 and 2 are taken out of their holders. How many bulbs glow?
2. 2.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) a single current path (c) one out, the rest glow (d) one bulb out, all go out
3. 3.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
4. 4.Which of these is true of a parallel circuit? (a) many paths for current (b) a break stops every bulb (c) a single current path (d) one bulb out, all go out
5. 5.💡 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
6. 6.💡 4 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
7. 7.💡 2 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
8. 8.Which of these is true of a series circuit? (a) own switch for each bulb (b) used in house wiring (c) a single current path (d) one out, the rest glow
9. 9.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
10. 10.Which of these is true of a series circuit? (a) each gets the full volts (b) one out, the rest glow (c) one bulb out, all go out (d) used in house wiring
11. 11.💡 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?
12. 12.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
13. 13.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
14. 14.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
15. 15.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) bulbs share the voltage (c) a single current path (d) each gets the full volts
16. 16.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
17. 17.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
18. 18.💡 3 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
19. 19.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
20. 20.💡 Why is house wiring done in parallel? (a) so all go off together (b) to make bulbs dim (c) to save copper only (d) each gets full voltage
21. 21.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
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.💡 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?
24. 24.💡 4 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
25. 25.💡 A battery lights 5 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
26. 26.💡 6 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
27. 27.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
28. 28.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
29. 29.Which of these is true of a series circuit? (a) one out, the rest glow (b) own switch for each bulb (c) a break stops every bulb (d) many paths for current
30. 30.💡 6 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
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 2 is taken out of its holder. How many bulbs glow?
32. 32.💡 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. Bulbs 1 and 3 are taken out of their holders. How many bulbs glow?
33. 33.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) own switch for each bulb (c) a break stops every bulb (d) a single current path
34. 34.💡 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. Bulbs 3 and 4 are taken out of their holders. Does bulb 2 glow? (a) Yes (b) No
35. 35.💡 6 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?
36. 36.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
37. 37.💡 2 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
38. 38.💡 3 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
39. 39.💡 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?
40. 40.Which of these is true of a series circuit? (a) each gets the full volts (b) bulbs share the voltage (c) own switch for each bulb (d) many paths for current

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