Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 105 · 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.💡 4 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
2. 2.💡 Why is house wiring done in parallel? (a) to save copper only (b) so all go off together (c) each gets full voltage (d) to make bulbs dim
3. 3.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
4. 4.💡 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
5. 5.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) one out, the rest glow
6. 6.💡 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?
7. 7.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
8. 8.Which of these is true of a parallel circuit? (a) own switch for each bulb (b) bulbs share the voltage (c) one bulb out, all go out (d) a break stops every bulb
9. 9.💡 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 3 and 6 are taken out of their holders. How many bulbs glow?
10. 10.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a single current path (c) a break stops every bulb (d) each gets the full volts
11. 11.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
12. 12.💡 2 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
13. 13.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
14. 14.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they get dimmer (c) they all go out (d) they keep glowing
15. 15.💡 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. Does bulb 2 glow? (a) No (b) Yes
16. 16.💡 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?
17. 17.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
18. 18.Which of these is true of a series circuit? (a) each gets the full volts (b) one bulb out, all go out (c) own switch for each bulb (d) used in house wiring
19. 19.Which of these is true of a series circuit? (a) each gets the full volts (b) many paths for current (c) a single current path (d) own switch for each bulb
20. 20.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
21. 21.💡 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?
22. 22.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
23. 23.💡 3 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
24. 24.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) a single current path (c) many paths for current (d) one bulb out, all go out
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.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
27. 27.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
28. 28.💡 4 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
29. 29.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
30. 30.💡 6 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?
31. 31.💡 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?
32. 32.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
33. 33.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
34. 34.💡 5 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
35. 35.💡 A battery lights 2 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
36. 36.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
37. 37.💡 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 5 are taken out of their holders. How many bulbs glow?
38. 38.💡 2 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
39. 39.💡 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 3 are taken out of their holders. How many bulbs glow?
40. 40.💡 2 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =

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