Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 227 · 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.True or false: “a single current path” is true of a series circuit. (a) False (b) True
2. 2.💡 5 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?
3. 3.💡 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 2 are taken out of their holders. How many bulbs glow?
4. 4.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
5. 5.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
6. 6.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
7. 7.Which of these is true of a series circuit? (a) used in house wiring (b) many paths for current (c) bulbs share the voltage (d) each gets the full volts
8. 8.💡 6 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?
9. 9.💡 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
10. 10.💡 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?
11. 11.💡 4 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
12. 12.💡 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. Does bulb 3 glow? (a) Yes (b) No
13. 13.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) used in house wiring (c) one bulb out, all go out (d) a single current path
14. 14.Which of these is true of a parallel circuit? (a) a single current path (b) bulbs share the voltage (c) one bulb out, all go out (d) one out, the rest glow
15. 15.💡 Why is house wiring done in parallel? (a) to save copper only (b) so all go off together (c) each gets full voltage (d) to make bulbs dim
16. 16.Which of these is true of a series circuit? (a) used in house wiring (b) a single current path (c) many paths for current (d) each gets the full volts
17. 17.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they get dimmer (c) they all go out (d) they keep glowing
18. 18.Which of these is true of a series circuit? (a) one bulb out, all go out (b) many paths for current (c) each gets the full volts (d) used in house wiring
19. 19.Which of these is true of a parallel circuit? (a) many paths for current (b) a single current path (c) a break stops every bulb (d) one bulb out, all go out
20. 20.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
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 1 is taken out of its holder. How many bulbs glow?
22. 22.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) each gets the full volts (c) one bulb out, all go out (d) bulbs share the voltage
23. 23.💡 4 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
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.💡 3 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
26. 26.💡 3 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
27. 27.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
28. 28.💡 A battery lights 4 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
29. 29.💡 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. Does bulb 5 glow? (a) No (b) Yes
30. 30.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
31. 31.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
32. 32.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
33. 33.💡 2 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
34. 34.💡 4 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
35. 35.💡 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 3 is taken out of its holder. Does bulb 1 glow? (a) Yes (b) No
36. 36.💡 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) dimmer (c) the same
37. 37.💡 4 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
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.💡 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?
40. 40.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True

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