Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 2 · 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.💡 2 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
2. 2.💡 Why is house wiring done in parallel? (a) so all go off together (b) to make bulbs dim (c) to save copper only (d) each gets full voltage
3. 3.💡 A battery lights 4 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
4. 4.💡 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
5. 5.💡 5 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
6. 6.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) one out, the rest glow (c) a single current path (d) a break stops every bulb
7. 7.Which of these is true of a series circuit? (a) bulbs share the voltage (b) each gets the full volts (c) many paths for current (d) one out, the rest glow
8. 8.💡 4 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
9. 9.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
10. 10.Which of these is true of a series circuit? (a) many paths for current (b) own switch for each bulb (c) a single current path (d) each gets the full volts
11. 11.Which of these is true of a series circuit? (a) own switch for each bulb (b) a break stops every bulb (c) used in house wiring (d) each gets the full volts
12. 12.💡 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
13. 13.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a break stops every bulb (c) a single current path (d) many paths for current
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) the same (b) brighter (c) dimmer
15. 15.💡 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. How many bulbs glow?
16. 16.💡 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?
17. 17.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
18. 18.💡 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?
19. 19.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) bulbs share the voltage (c) own switch for each bulb (d) a break stops every bulb
20. 20.💡 5 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?
21. 21.💡 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) the same (c) dimmer
22. 22.Which of these is true of a series circuit? (a) many paths for current (b) each gets the full volts (c) own switch for each bulb (d) one bulb out, all go out
23. 23.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
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.💡 4 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?
26. 26.💡 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 3 is taken out of its holder. Does bulb 4 glow? (a) No (b) Yes
27. 27.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
28. 28.Which of these is true of a parallel circuit? (a) a single current path (b) a break stops every bulb (c) each gets the full volts (d) one bulb out, all go out
29. 29.💡 2 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
30. 30.💡 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 3 is taken out of its holder. How many bulbs glow?
31. 31.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a single current path (c) used in house wiring (d) one bulb out, all go out
32. 32.💡 6 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
33. 33.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
34. 34.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
35. 35.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
36. 36.💡 6 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
37. 37.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
38. 38.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
39. 39.💡 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. Bulbs 1 and 2 are taken out of their holders. How many bulbs glow?
40. 40.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =

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