Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 205 · 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 series circuit? (a) a single current path (b) used in house wiring (c) many paths for current (d) each gets the full volts
2. 2.💡 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) brighter (c) the same
3. 3.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one bulb out, all go out (c) a single current path (d) one out, the rest glow
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. Bulbs 2 and 4 are taken out of their holders. How many bulbs glow?
5. 5.💡 5 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
6. 6.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
7. 7.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they keep glowing (c) they get dimmer (d) they all go out
8. 8.💡 4 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?
9. 9.💡 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
10. 10.💡 4 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
11. 11.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
12. 12.💡 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?
13. 13.True or false: “a single current path” is true of a series circuit. (a) False (b) True
14. 14.💡 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
15. 15.💡 3 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
16. 16.Which of these is true of a parallel circuit? (a) a single current path (b) bulbs share the voltage (c) a break stops every bulb (d) own switch for each bulb
17. 17.💡 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 2 are taken out of their holders. How many bulbs glow?
18. 18.💡 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. Bulb 1 is taken out of its holder. How many bulbs glow?
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. Bulbs 1 and 6 are taken out of their holders. How many bulbs glow?
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.Which of these is true of a series circuit? (a) a break stops every bulb (b) used in house wiring (c) each gets the full volts (d) many paths for current
22. 22.💡 3 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
23. 23.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
24. 24.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
25. 25.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
26. 26.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
27. 27.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
28. 28.💡 5 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?
29. 29.Which of these is true of a series circuit? (a) bulbs share the voltage (b) each gets the full volts (c) own switch for each bulb (d) used in house wiring
30. 30.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
31. 31.💡 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
32. 32.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
33. 33.💡 2 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
34. 34.💡 6 identical bulbs are in parallel and each one takes 0.1 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.💡 3 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
37. 37.💡 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. Bulb 2 is taken out of its holder. How many bulbs glow?
38. 38.💡 4 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
39. 39.💡 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?
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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