Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 113 · 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.💡 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 1 is taken out of its holder. Does bulb 4 glow? (a) Yes (b) No
2. 2.💡 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?
3. 3.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) to make bulbs dim (d) each gets full voltage
4. 4.💡 2 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
5. 5.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) many paths for current (c) bulbs share the voltage (d) a single current path
6. 6.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they all go out (c) they keep glowing (d) they explode
7. 7.True or false: “a single current path” is true of a series circuit. (a) True (b) False
8. 8.Which of these is true of a series circuit? (a) used in house wiring (b) many paths for current (c) own switch for each bulb (d) one bulb out, all go out
9. 9.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
10. 10.💡 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?
11. 11.Which of these is true of a parallel circuit? (a) a single current path (b) bulbs share the voltage (c) one out, the rest glow (d) a break stops every bulb
12. 12.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
13. 13.💡 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 4 are taken out of their holders. How many bulbs glow?
14. 14.💡 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 5 are taken out of their holders. How many bulbs glow?
15. 15.💡 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?
16. 16.Which of these is true of a series circuit? (a) used in house wiring (b) many paths for current (c) own switch for each bulb (d) bulbs share the voltage
17. 17.💡 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
18. 18.💡 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?
19. 19.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
20. 20.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
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 2 is taken out of its holder. How many bulbs glow?
22. 22.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
23. 23.💡 5 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
24. 24.💡 4 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
25. 25.Which of these is true of a series circuit? (a) a break stops every bulb (b) many paths for current (c) each gets the full volts (d) one out, the rest glow
26. 26.💡 6 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
27. 27.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
28. 28.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
29. 29.💡 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?
30. 30.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
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. Bulbs 1 and 2 are taken out of their holders. How many bulbs glow?
32. 32.💡 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 6 are taken out of their holders. Does bulb 1 glow? (a) Yes (b) No
33. 33.💡 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 1 is taken out of its holder. How many bulbs glow?
34. 34.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
35. 35.💡 3 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
36. 36.💡 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) the same (c) dimmer
37. 37.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
38. 38.💡 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. All the bulbs are in place. How many bulbs glow?
39. 39.💡 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?
40. 40.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True

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