Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 292 · 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 joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
2. 2.💡 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. 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. Bulb 1 is taken out of its holder. How many bulbs glow?
4. 4.💡 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?
5. 5.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
6. 6.💡 2 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
7. 7.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
8. 8.💡 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?
9. 9.Which of these is true of a parallel circuit? (a) a single current path (b) bulbs share the voltage (c) each gets the full volts (d) one bulb out, all go out
10. 10.Which of these is true of a series circuit? (a) each gets the full volts (b) one out, the rest glow (c) own switch for each bulb (d) a single current path
11. 11.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) each gets full voltage (c) so all go off together (d) to save copper only
12. 12.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
13. 13.Which of these is true of a parallel circuit? (a) a single current path (b) many paths for current (c) one bulb out, all go out (d) bulbs share the voltage
14. 14.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
15. 15.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they get dimmer (d) they keep glowing
16. 16.💡 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?
17. 17.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
18. 18.Which of these is true of a series circuit? (a) own switch for each bulb (b) a break stops every bulb (c) used in house wiring (d) many paths for current
19. 19.💡 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 6 is taken out of its holder. Does bulb 4 glow? (a) Yes (b) No
20. 20.💡 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 3 and 4 are taken out of their holders. How many bulbs glow?
21. 21.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one out, the rest glow (c) a single current path (d) one bulb out, all go out
22. 22.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
23. 23.💡 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?
24. 24.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
25. 25.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
26. 26.💡 5 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
27. 27.💡 3 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
28. 28.Which of these is true of a series circuit? (a) used in house wiring (b) bulbs share the voltage (c) one out, the rest glow (d) own switch for each bulb
29. 29.💡 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 1 is taken out of its holder. How many bulbs glow?
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.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) own switch for each bulb
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 2 and 5 are taken out of their holders. Does bulb 1 glow? (a) No (b) Yes
33. 33.💡 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 1 and 4 are taken out of their holders. How many bulbs glow?
34. 34.💡 A battery lights 5 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
35. 35.💡 2 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
36. 36.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
37. 37.💡 5 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
38. 38.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
39. 39.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
40. 40.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True

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