Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 8 · 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.💡 2 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
2. 2.💡 3 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
3. 3.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a single current path (c) bulbs share the voltage (d) used in house wiring
4. 4.💡 Why is house wiring done in parallel? (a) to save copper only (b) each gets full voltage (c) to make bulbs dim (d) so all go off together
5. 5.💡 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. All the bulbs are in place. Does bulb 1 glow? (a) No (b) Yes
6. 6.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) one out, the rest glow (c) a break stops every bulb (d) a single current path
7. 7.Which of these is true of a series circuit? (a) many paths for current (b) each gets the full volts (c) a break stops every bulb (d) used in house wiring
8. 8.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
9. 9.💡 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. How many bulbs glow?
10. 10.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
11. 11.Which of these is true of a series circuit? (a) each gets the full volts (b) own switch for each bulb (c) one bulb out, all go out (d) many paths for current
12. 12.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they all go out (c) they keep glowing (d) they get dimmer
13. 13.💡 5 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
14. 14.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
15. 15.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
16. 16.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
17. 17.💡 A battery lights 4 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
18. 18.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
19. 19.Which of these is true of a series circuit? (a) used in house wiring (b) one out, the rest glow (c) each gets the full volts (d) a single current path
20. 20.💡 6 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
21. 21.💡 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) the same (c) dimmer
22. 22.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
23. 23.💡 4 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
24. 24.💡 3 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
25. 25.💡 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?
26. 26.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) bulbs share the voltage (c) one bulb out, all go out (d) many paths for current
27. 27.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
28. 28.Which of these is true of a series circuit? (a) one out, the rest glow (b) bulbs share the voltage (c) each gets the full volts (d) many paths for current
29. 29.💡 4 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
30. 30.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) own switch for each bulb (c) a single current path (d) bulbs share the voltage
31. 31.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
32. 32.💡 4 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
33. 33.💡 6 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
34. 34.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
35. 35.💡 3 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
36. 36.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
37. 37.💡 2 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
38. 38.True or false: “a single current path” is true of a series circuit. (a) True (b) False
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.💡 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?

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