Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 314 · 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.💡 3 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
2. 2.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they keep glowing (c) they explode (d) they all go out
3. 3.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
4. 4.💡 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?
5. 5.Which of these is true of a parallel circuit? (a) a single current path (b) one bulb out, all go out (c) own switch for each bulb (d) a break stops every bulb
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) dimmer (b) brighter (c) the same
7. 7.Which of these is true of a series circuit? (a) own switch for each bulb (b) a single current path (c) many paths for current (d) used in house wiring
8. 8.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
9. 9.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) bulbs share the voltage (c) one out, the rest glow (d) a single current path
10. 10.💡 6 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
11. 11.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
12. 12.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) so all go off together (c) each gets full voltage (d) to save copper only
13. 13.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
14. 14.Which of these is true of a series circuit? (a) many paths for current (b) one bulb out, all go out (c) each gets the full volts (d) one out, the rest glow
15. 15.💡 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?
16. 16.Which of these is true of a parallel circuit? (a) a single current path (b) bulbs share the voltage (c) used in house wiring (d) a break stops every bulb
17. 17.💡 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
18. 18.💡 5 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
19. 19.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) each gets the full volts (c) one bulb out, all go out (d) bulbs share the voltage
20. 20.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
21. 21.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
22. 22.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) bulbs share the voltage (c) many paths for current (d) a break stops every bulb
23. 23.💡 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. Does bulb 2 glow? (a) No (b) Yes
24. 24.💡 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 2 and 6 are taken out of their holders. How many bulbs glow?
25. 25.💡 4 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
26. 26.💡 3 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
27. 27.💡 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 3 are taken out of their holders. How many bulbs glow?
28. 28.💡 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) the same (c) dimmer
29. 29.Which of these is true of a series circuit? (a) one out, the rest glow (b) own switch for each bulb (c) used in house wiring (d) bulbs share the voltage
30. 30.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
31. 31.💡 5 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
32. 32.💡 4 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
33. 33.💡 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?
34. 34.💡 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?
35. 35.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
36. 36.💡 5 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
37. 37.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
38. 38.💡 3 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
39. 39.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
40. 40.Which of these is true of a series circuit? (a) used in house wiring (b) each gets the full volts (c) one out, the rest glow (d) a break stops every bulb

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