Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 98 · 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 (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulbs 2 and 3 are taken out of their holders. How many bulbs glow?
2. 2.💡 2 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
3. 3.💡 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 3 glow? (a) Yes (b) No
4. 4.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
5. 5.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
6. 6.Which of these is true of a series circuit? (a) one out, the rest glow (b) each gets the full volts (c) own switch for each bulb (d) bulbs share the voltage
7. 7.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they get dimmer (c) they explode (d) they keep glowing
8. 8.Which of these is true of a parallel circuit? (a) used in house wiring (b) one bulb out, all go out (c) bulbs share the voltage (d) a single current path
9. 9.💡 6 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
10. 10.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
11. 11.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
12. 12.Which of these is true of a series circuit? (a) each gets the full volts (b) used in house wiring (c) a break stops every bulb (d) own switch for each bulb
13. 13.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one out, the rest glow (c) one bulb out, all go out (d) a break stops every bulb
14. 14.💡 5 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
15. 15.Which of these is true of a series circuit? (a) many paths for current (b) own switch for each bulb (c) used in house wiring (d) one bulb out, all go out
16. 16.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
17. 17.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
18. 18.💡 5 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
19. 19.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) to make bulbs dim (d) each gets full voltage
20. 20.💡 2 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
21. 21.💡 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
22. 22.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
23. 23.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) a single current path (c) each gets the full volts (d) one bulb out, all go out
24. 24.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
25. 25.💡 2 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
26. 26.Which of these is true of a parallel circuit? (a) own switch for each bulb (b) a break stops every bulb (c) one bulb out, all go out (d) bulbs share the voltage
27. 27.Which of these is true of a series circuit? (a) one out, the rest glow (b) many paths for current (c) a single current path (d) own switch for each bulb
28. 28.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
29. 29.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
30. 30.💡 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?
31. 31.💡 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. How many bulbs glow?
32. 32.💡 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?
33. 33.💡 3 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
34. 34.💡 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. Does bulb 1 glow? (a) No (b) Yes
35. 35.💡 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
36. 36.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
37. 37.💡 A battery lights 5 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
38. 38.💡 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?
39. 39.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
40. 40.💡 3 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =

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