Electronics Worksheet: Parallel Circuits

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

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