Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 86 · 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.💡 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?
2. 2.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
3. 3.💡 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
4. 4.True or false: “a single current path” is true of a series circuit. (a) False (b) True
5. 5.💡 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?
6. 6.💡 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
7. 7.Which of these is true of a series circuit? (a) used in house wiring (b) each gets the full volts (c) a single current path (d) many paths for current
8. 8.💡 4 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
9. 9.Which of these is true of a parallel circuit? (a) many paths for current (b) a break stops every bulb (c) one bulb out, all go out (d) a single current path
10. 10.Which of these is true of a series circuit? (a) used in house wiring (b) own switch for each bulb (c) many paths for current (d) one bulb out, all go out
11. 11.Which of these is true of a series circuit? (a) used in house wiring (b) one out, the rest glow (c) bulbs share the voltage (d) own switch for each bulb
12. 12.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
13. 13.💡 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
14. 14.💡 5 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?
15. 15.💡 2 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
16. 16.💡 3 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
17. 17.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
18. 18.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
19. 19.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
20. 20.💡 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?
21. 21.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
22. 22.Which of these is true of a series circuit? (a) many paths for current (b) one out, the rest glow (c) own switch for each bulb (d) a break stops every bulb
23. 23.💡 5 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
24. 24.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
25. 25.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
26. 26.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
27. 27.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
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.Which of these is true of a parallel circuit? (a) a single current path (b) a break stops every bulb (c) own switch for each bulb (d) bulbs share the voltage
30. 30.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
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. Bulbs 1 and 2 are taken out of their holders. How many bulbs glow?
32. 32.💡 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 5 are taken out of their holders. How many bulbs glow?
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. Bulbs 1 and 2 are taken out of their holders. How many bulbs glow?
34. 34.💡 3 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
35. 35.💡 3 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
36. 36.💡 3 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
37. 37.💡 A battery lights 3 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
38. 38.💡 3 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
39. 39.💡 5 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
40. 40.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True

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