Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 134 · 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.💡 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?
3. 3.💡 4 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
4. 4.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) each gets full voltage (c) so all go off together (d) to save copper only
5. 5.💡 5 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
6. 6.True or false: “many paths for current” 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 all go out (b) they explode (c) they keep glowing (d) they get dimmer
8. 8.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) own switch for each bulb
9. 9.Which of these is true of a parallel circuit? (a) used in house wiring (b) a break stops every bulb (c) a single current path (d) one bulb out, all go out
10. 10.💡 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?
11. 11.💡 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 3 and 4 are taken out of their holders. How many bulbs glow?
12. 12.💡 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 5 are taken out of their holders. How many bulbs glow?
13. 13.💡 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?
14. 14.Which of these is true of a series circuit? (a) each gets the full volts (b) used in house wiring (c) bulbs share the voltage (d) many paths for current
15. 15.💡 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
16. 16.💡 A battery lights 4 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
17. 17.Which of these is true of a parallel circuit? (a) each gets the full volts (b) one bulb out, all go out (c) bulbs share the voltage (d) a single current path
18. 18.💡 4 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
19. 19.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
20. 20.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
21. 21.💡 5 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
22. 22.💡 4 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?
23. 23.💡 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?
24. 24.💡 4 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
25. 25.💡 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 1 is taken out of its holder. Does bulb 2 glow? (a) Yes (b) No
26. 26.💡 2 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
27. 27.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
28. 28.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
29. 29.💡 3 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
30. 30.Which of these is true of a parallel circuit? (a) one out, the rest glow (b) one bulb out, all go out (c) bulbs share the voltage (d) a single current path
31. 31.💡 2 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
32. 32.💡 6 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
33. 33.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
34. 34.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
35. 35.True or false: “a single current path” is true of a series circuit. (a) True (b) False
36. 36.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
37. 37.Which of these is true of a series circuit? (a) one out, the rest glow (b) a break stops every bulb (c) used in house wiring (d) many paths for current
38. 38.💡 3 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
39. 39.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
40. 40.Which of these is true of a parallel circuit? (a) many paths for current (b) a break stops every bulb (c) one bulb out, all go out (d) bulbs share the voltage

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