Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 305 · 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: “each gets the full volts” is true of a series circuit. (a) False (b) True
2. 2.Which of these is true of a series circuit? (a) bulbs share the voltage (b) used in house wiring (c) each gets the full volts (d) many paths for current
3. 3.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) a single current path
4. 4.💡 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) brighter (c) the same
5. 5.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
6. 6.💡 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) dimmer (c) the same
7. 7.💡 5 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
8. 8.💡 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. How many bulbs glow?
9. 9.💡 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. All the bulbs are in place. Does bulb 4 glow? (a) No (b) Yes
10. 10.Which of these is true of a series circuit? (a) used in house wiring (b) own switch for each bulb (c) a break stops every bulb (d) one out, the rest glow
11. 11.Which of these is true of a series circuit? (a) one out, the rest glow (b) own switch for each bulb (c) many paths for current (d) one bulb out, all go out
12. 12.💡 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 5 and 6 are taken out of their holders. How many bulbs glow?
13. 13.💡 Why is house wiring done in parallel? (a) to save copper only (b) so all go off together (c) to make bulbs dim (d) each gets full voltage
14. 14.💡 3 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
15. 15.💡 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?
16. 16.💡 3 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
17. 17.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
18. 18.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
19. 19.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
20. 20.Which of these is true of a parallel circuit? (a) a single current path (b) a break stops every bulb (c) each gets the full volts (d) bulbs share the voltage
21. 21.💡 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
22. 22.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they explode (c) they all go out (d) they keep glowing
23. 23.True or false: “a single current path” is true of a series circuit. (a) False (b) True
24. 24.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
25. 25.💡 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?
26. 26.💡 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 5 are taken out of their holders. How many bulbs glow?
27. 27.Which of these is true of a parallel circuit? (a) used in house wiring (b) one bulb out, all go out (c) a single current path (d) a break stops every bulb
28. 28.💡 2 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
29. 29.💡 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) the same (c) brighter
30. 30.💡 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?
31. 31.Which of these is true of a parallel circuit? (a) a single current path (b) bulbs share the voltage (c) a break stops every bulb (d) one out, the rest glow
32. 32.💡 2 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
33. 33.💡 6 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?
34. 34.💡 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?
35. 35.Which of these is true of a series circuit? (a) own switch for each bulb (b) a single current path (c) many paths for current (d) used in house wiring
36. 36.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a break stops every bulb (c) a single current path (d) own switch for each bulb
37. 37.💡 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?
38. 38.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
39. 39.💡 3 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
40. 40.💡 2 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =

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