Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 159 · 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.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they get dimmer (c) they all go out (d) they keep glowing
2. 2.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) so all go off together (d) each gets full voltage
3. 3.💡 2 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
4. 4.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
5. 5.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
6. 6.💡 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. How many bulbs glow?
7. 7.💡 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
8. 8.Which of these is true of a parallel circuit? (a) used in house wiring (b) a single current path (c) one bulb out, all go out (d) a break stops every bulb
9. 9.💡 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 3 are taken out of their holders. How many bulbs glow?
10. 10.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
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.💡 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?
13. 13.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
14. 14.💡 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
15. 15.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
16. 16.💡 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. Bulb 5 is taken out of its holder. Does bulb 1 glow? (a) No (b) Yes
17. 17.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
18. 18.💡 3 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
19. 19.Which of these is true of a series circuit? (a) each gets the full volts (b) own switch for each bulb (c) many paths for current (d) one bulb out, all go out
20. 20.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 5 of the switches are OFF and the rest are ON. How many bulbs glow?
21. 21.Which of these is true of a parallel circuit? (a) each gets the full volts (b) bulbs share the voltage (c) a break stops every bulb (d) one bulb out, all go out
22. 22.💡 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. Bulb 3 is taken out of its holder. Does bulb 5 glow? (a) No (b) Yes
23. 23.💡 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?
24. 24.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
25. 25.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
26. 26.💡 5 identical bulbs are in parallel and each one takes 0.1 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 3 and 5 are taken out of their holders. How many bulbs glow?
28. 28.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
29. 29.Which of these is true of a series circuit? (a) used in house wiring (b) bulbs share the voltage (c) own switch for each bulb (d) each gets the full volts
30. 30.💡 6 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
31. 31.💡 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
32. 32.Which of these is true of a series circuit? (a) each gets the full volts (b) used in house wiring (c) own switch for each bulb (d) a break stops every bulb
33. 33.Which of these is true of a series circuit? (a) many paths for current (b) a single current path (c) each gets the full volts (d) own switch for each bulb
34. 34.💡 3 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
35. 35.💡 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. Bulb 3 is taken out of its holder. How many bulbs glow?
36. 36.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
37. 37.💡 6 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
38. 38.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
39. 39.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) a single current path
40. 40.💡 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?

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