Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 45 · 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 parallel circuit? (a) many paths for current (b) a break stops every bulb (c) bulbs share the voltage (d) one bulb out, all go out
2. 2.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
3. 3.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they get dimmer (c) they explode (d) they keep glowing
4. 4.💡 3 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
5. 5.💡 6 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
6. 6.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a single current path (c) one bulb out, all go out (d) each gets the full volts
7. 7.💡 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?
8. 8.💡 4 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
9. 9.💡 2 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
10. 10.💡 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. 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.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
13. 13.Which of these is true of a series circuit? (a) one out, the rest glow (b) own switch for each bulb (c) used in house wiring (d) bulbs share the voltage
14. 14.💡 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. How many bulbs glow?
15. 15.💡 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?
16. 16.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a single current path (c) a break stops every bulb (d) one out, the rest glow
17. 17.💡 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
18. 18.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
19. 19.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to save copper only (c) to make bulbs dim (d) so all go off together
20. 20.💡 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 4 are taken out of their holders. How many bulbs glow?
21. 21.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
22. 22.💡 2 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
23. 23.💡 4 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
24. 24.💡 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 4 are taken out of their holders. Does bulb 5 glow? (a) Yes (b) No
25. 25.Which of these is true of a series circuit? (a) own switch for each bulb (b) one out, the rest glow (c) one bulb out, all go out (d) used in house wiring
26. 26.Which of these is true of a series circuit? (a) used in house wiring (b) a break stops every bulb (c) each gets the full volts (d) own switch for each bulb
27. 27.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
28. 28.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
29. 29.💡 5 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?
30. 30.💡 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. All the bulbs are in place. How many bulbs glow?
31. 31.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
32. 32.💡 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?
33. 33.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
34. 34.💡 5 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 joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
36. 36.💡 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) dimmer (c) brighter
37. 37.💡 4 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
38. 38.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a break stops every bulb (c) bulbs share the voltage (d) own switch for each bulb
39. 39.💡 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
40. 40.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True

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