Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 23 · 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.💡 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
2. 2.💡 4 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?
3. 3.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) bulbs share the voltage
4. 4.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they all go out (c) they get dimmer (d) they explode
5. 5.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
6. 6.💡 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) the same (c) brighter
7. 7.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
8. 8.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
9. 9.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one bulb out, all go out (c) each gets the full volts (d) bulbs share the voltage
10. 10.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
11. 11.True or false: “a single current path” is true of a series circuit. (a) False (b) True
12. 12.💡 3 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
13. 13.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
14. 14.Which of these is true of a series circuit? (a) many paths for current (b) bulbs share the voltage (c) own switch for each bulb (d) one out, the rest glow
15. 15.Which of these is true of a series circuit? (a) used in house wiring (b) own switch for each bulb (c) a break stops every bulb (d) each gets the full volts
16. 16.Which of these is true of a series circuit? (a) one bulb out, all go out (b) many paths for current (c) own switch for each bulb (d) one out, the rest glow
17. 17.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
18. 18.💡 6 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
19. 19.💡 4 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
20. 20.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
21. 21.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
22. 22.💡 2 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
23. 23.Which of these is true of a series circuit? (a) many paths for current (b) a single current path (c) own switch for each bulb (d) each gets the full volts
24. 24.💡 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?
25. 25.💡 6 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
26. 26.💡 A battery lights 2 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
27. 27.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) a single current path (c) own switch for each bulb (d) one bulb out, all go out
28. 28.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
29. 29.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
30. 30.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
31. 31.💡 4 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
32. 32.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
33. 33.💡 3 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
34. 34.💡 4 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?
35. 35.💡 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
36. 36.💡 A battery lights 4 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
37. 37.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) bulbs share the voltage (c) used in house wiring (d) a break stops every bulb
38. 38.💡 3 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
39. 39.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
40. 40.💡 2 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =

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