Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 55 · 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) so all go off together (b) to make bulbs dim (c) to save copper only (d) each gets full voltage
2. 2.💡 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?
3. 3.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
4. 4.💡 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 2 is taken out of its holder. How many bulbs glow?
5. 5.💡 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?
6. 6.💡 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
7. 7.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
8. 8.💡 5 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
9. 9.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a single current path (c) each gets the full volts (d) a break stops every bulb
10. 10.💡 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?
11. 11.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
12. 12.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they explode (c) they all go out (d) they get dimmer
13. 13.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one bulb out, all go out (c) bulbs share the voltage (d) one out, the rest glow
14. 14.💡 2 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
15. 15.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
16. 16.Which of these is true of a parallel circuit? (a) many paths for current (b) bulbs share the voltage (c) a break stops every bulb (d) one bulb out, all go out
17. 17.Which of these is true of a series circuit? (a) a single current path (b) each gets the full volts (c) one out, the rest glow (d) own switch for each bulb
18. 18.💡 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?
19. 19.💡 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. Bulbs 1 and 2 are taken out of their holders. How many bulbs glow?
20. 20.💡 2 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
21. 21.💡 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 4 and 5 are taken out of their holders. How many bulbs glow?
22. 22.Which of these is true of a series circuit? (a) used in house wiring (b) each gets the full volts (c) a break stops every bulb (d) own switch for each bulb
23. 23.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
24. 24.💡 4 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
25. 25.💡 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) the same (c) brighter
26. 26.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
27. 27.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
28. 28.💡 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. How many bulbs glow?
29. 29.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
30. 30.💡 4 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
31. 31.💡 2 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
32. 32.True or false: “a single current path” is true of a series circuit. (a) False (b) True
33. 33.💡 5 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
34. 34.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
35. 35.Which of these is true of a series circuit? (a) one bulb out, all go out (b) each gets the full volts (c) many paths for current (d) one out, the rest glow
36. 36.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) own switch for each bulb (c) bulbs share the voltage (d) one bulb out, all go out
37. 37.💡 3 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
38. 38.💡 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?
39. 39.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) bulbs share the voltage (c) a single current path (d) used in house wiring
40. 40.💡 5 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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