Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 285 · 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.💡 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
2. 2.💡 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 1 is taken out of its holder. How many bulbs glow?
3. 3.💡 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
4. 4.💡 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?
5. 5.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a break stops every bulb (c) a single current path (d) one out, the rest glow
6. 6.Which of these is true of a series circuit? (a) one out, the rest glow (b) used in house wiring (c) one bulb out, all go out (d) many paths for current
7. 7.💡 4 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
8. 8.💡 6 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
9. 9.💡 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?
10. 10.💡 5 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
11. 11.💡 4 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
12. 12.💡 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. Does bulb 3 glow? (a) No (b) Yes
13. 13.Which of these is true of a series circuit? (a) used in house wiring (b) each gets the full volts (c) bulbs share the voltage (d) own switch for each bulb
14. 14.💡 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?
15. 15.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
16. 16.Which of these is true of a series circuit? (a) used in house wiring (b) own switch for each bulb (c) many paths for current (d) a break stops every bulb
17. 17.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
18. 18.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
19. 19.💡 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. All the bulbs are in place. How many bulbs glow?
20. 20.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they get dimmer (c) they keep glowing (d) they all go out
21. 21.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
22. 22.💡 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?
23. 23.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) each gets full voltage (d) so all go off together
24. 24.💡 2 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
25. 25.💡 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?
26. 26.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
27. 27.💡 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?
28. 28.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) many paths for current
29. 29.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
30. 30.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a break stops every bulb (c) bulbs share the voltage (d) own switch for each bulb
31. 31.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
32. 32.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
33. 33.Which of these is true of a series circuit? (a) many paths for current (b) one out, the rest glow (c) own switch for each bulb (d) a single current path
34. 34.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
35. 35.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
36. 36.💡 3 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
37. 37.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
38. 38.💡 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?
39. 39.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
40. 40.💡 3 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =

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