Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 47 · 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 save copper only (c) each gets full voltage (d) to make bulbs dim
2. 2.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
3. 3.💡 4 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
4. 4.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they keep glowing (d) they get dimmer
5. 5.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) bulbs share the voltage (c) many paths for current (d) one bulb out, all go out
6. 6.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
7. 7.💡 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. Does bulb 4 glow? (a) Yes (b) No
8. 8.Which of these is true of a series circuit? (a) many paths for current (b) a break stops every bulb (c) used in house wiring (d) one out, the rest glow
9. 9.💡 4 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
10. 10.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one bulb out, all go out (c) used in house wiring (d) a single current path
11. 11.💡 2 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
12. 12.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
13. 13.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
14. 14.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
15. 15.💡 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?
16. 16.💡 3 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
17. 17.Which of these is true of a series circuit? (a) one bulb out, all go out (b) used in house wiring (c) many paths for current (d) own switch for each bulb
18. 18.💡 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
19. 19.💡 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?
20. 20.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
21. 21.Which of these is true of a series circuit? (a) used in house wiring (b) each gets the full volts (c) many paths for current (d) a single current path
22. 22.💡 4 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
23. 23.💡 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?
24. 24.💡 3 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
25. 25.💡 A battery lights 5 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.💡 3 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
27. 27.💡 4 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
28. 28.True or false: “a single current path” is true of a series circuit. (a) True (b) False
29. 29.Which of these is true of a series circuit? (a) many paths for current (b) bulbs share the voltage (c) one out, the rest glow (d) own switch for each bulb
30. 30.💡 3 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
31. 31.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
32. 32.💡 3 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
33. 33.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) a single current path (c) one bulb out, all go out (d) each gets the full volts
34. 34.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
35. 35.💡 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 4 are taken out of their holders. Does bulb 2 glow? (a) No (b) Yes
36. 36.💡 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) dimmer (c) the same
37. 37.💡 6 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
38. 38.💡 6 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
39. 39.Which of these is true of a parallel circuit? (a) a single current path (b) own switch for each bulb (c) a break stops every bulb (d) bulbs share the voltage
40. 40.Which of these is true of a parallel circuit? (a) one out, the rest glow (b) bulbs share the voltage (c) a single current path (d) a break stops every bulb

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