Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 59 · 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.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) so all go off together (c) to make bulbs dim (d) to save copper only
2. 2.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
3. 3.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
4. 4.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they keep glowing (c) they get dimmer (d) they explode
5. 5.💡 3 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
6. 6.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
7. 7.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
8. 8.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
9. 9.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
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) dimmer (b) brighter (c) the same
11. 11.💡 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 2 is taken out of its holder. How many bulbs glow?
12. 12.Which of these is true of a series circuit? (a) a break stops every bulb (b) own switch for each bulb (c) many paths for current (d) one out, the rest glow
13. 13.💡 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 5 is taken out of its holder. How many bulbs glow?
14. 14.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
15. 15.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
16. 16.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
17. 17.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) many paths for current (c) a single current path (d) bulbs share the voltage
18. 18.Which of these is true of a parallel circuit? (a) used in house wiring (b) a single current path (c) one bulb out, all go out (d) bulbs share the voltage
19. 19.💡 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
20. 20.💡 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 3 is taken out of its holder. How many bulbs glow?
21. 21.💡 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
22. 22.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one bulb out, all go out (c) own switch for each bulb (d) bulbs share the voltage
23. 23.True or false: “a single current path” is true of a series circuit. (a) False (b) True
24. 24.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 5 of the switches are OFF and the rest are ON. How many bulbs glow?
25. 25.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
26. 26.Which of these is true of a series circuit? (a) own switch for each bulb (b) one bulb out, all go out (c) each gets the full volts (d) used in house wiring
27. 27.💡 6 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
28. 28.💡 5 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
29. 29.💡 5 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
30. 30.💡 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?
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.💡 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. Does bulb 1 glow? (a) No (b) Yes
33. 33.💡 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. Bulb 2 is taken out of its holder. How many bulbs glow?
34. 34.Which of these is true of a series circuit? (a) bulbs share the voltage (b) many paths for current (c) own switch for each bulb (d) used in house wiring
35. 35.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
36. 36.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
37. 37.Which of these is true of a series circuit? (a) many paths for current (b) a single current path (c) each gets the full volts (d) one out, the rest glow
38. 38.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one out, the rest glow (c) a single current path (d) bulbs share the voltage
39. 39.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
40. 40.💡 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 1 and 6 are taken out of their holders. How many bulbs glow?

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