Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 165 · 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) to make bulbs dim (b) to save copper only (c) so all go off together (d) each gets full voltage
2. 2.Which of these is true of a series circuit? (a) each gets the full volts (b) one bulb out, all go out (c) many paths for current (d) used in house wiring
3. 3.💡 5 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.💡 2 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
5. 5.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
6. 6.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) one out, the rest glow (c) a single current path (d) a break stops every bulb
7. 7.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they get dimmer (c) they explode (d) they keep glowing
8. 8.💡 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 4 is taken out of its holder. How many bulbs glow?
9. 9.💡 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) No (b) Yes
10. 10.💡 2 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
11. 11.Which of these is true of a series circuit? (a) a break stops every bulb (b) each gets the full volts (c) own switch for each bulb (d) one out, the rest glow
12. 12.💡 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. How many bulbs glow?
13. 13.💡 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?
14. 14.💡 5 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
15. 15.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
16. 16.💡 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. How many bulbs glow?
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) the same (c) brighter
18. 18.💡 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 4 and 6 are taken out of their holders. Does bulb 5 glow? (a) Yes (b) No
19. 19.Which of these is true of a series circuit? (a) bulbs share the voltage (b) each gets the full volts (c) many paths for current (d) one out, the rest glow
20. 20.💡 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
21. 21.💡 2 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
22. 22.True or false: “a single current path” is true of a series circuit. (a) True (b) False
23. 23.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
24. 24.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
25. 25.💡 6 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?
26. 26.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) many paths for current (c) a break stops every bulb (d) bulbs share the voltage
27. 27.Which of these is true of a series circuit? (a) many paths for current (b) a single current path (c) own switch for each bulb (d) each gets the full volts
28. 28.💡 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. Does bulb 3 glow? (a) No (b) Yes
29. 29.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
30. 30.💡 A battery lights 2 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
31. 31.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
32. 32.💡 6 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
33. 33.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
34. 34.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
35. 35.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
36. 36.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
37. 37.💡 4 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
38. 38.💡 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?
39. 39.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a single current path (c) own switch for each bulb (d) a break stops every bulb
40. 40.💡 6 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =

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