Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 139 · 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) a single current path (d) own switch for each bulb
2. 2.💡 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. Bulbs 1 and 3 are taken out of their holders. How many bulbs glow?
3. 3.💡 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 1 is taken out of its holder. Does bulb 2 glow? (a) Yes (b) No
4. 4.💡 4 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
5. 5.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
6. 6.Which of these is true of a parallel circuit? (a) a single current path (b) one bulb out, all go out (c) a break stops every bulb (d) each gets the full volts
7. 7.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
8. 8.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
9. 9.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
10. 10.💡 4 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 parallel circuit? (a) bulbs share the voltage (b) many paths for current (c) a single current path (d) one bulb out, all go out
12. 12.💡 3 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
13. 13.💡 A battery lights 2 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
14. 14.Which of these is true of a series circuit? (a) one out, the rest glow (b) a break stops every bulb (c) own switch for each bulb (d) used in house wiring
15. 15.💡 2 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
16. 16.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
17. 17.💡 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. Bulb 3 is taken out of its holder. How many bulbs glow?
18. 18.💡 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
19. 19.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
20. 20.💡 2 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
21. 21.💡 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?
22. 22.💡 4 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
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.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
25. 25.💡 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 1 is taken out of its holder. How many bulbs glow?
26. 26.💡 5 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
27. 27.💡 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?
28. 28.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a break stops every bulb (c) own switch for each bulb (d) bulbs share the voltage
29. 29.True or false: “a single current path” is true of a series circuit. (a) True (b) False
30. 30.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
31. 31.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
32. 32.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
33. 33.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
34. 34.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
35. 35.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
36. 36.💡 5 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
37. 37.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
38. 38.💡 6 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
39. 39.💡 Why is house wiring done in parallel? (a) so all go off together (b) to make bulbs dim (c) each gets full voltage (d) to save copper only
40. 40.💡 5 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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