Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 136 · 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) to save copper only (b) to make bulbs dim (c) each gets full voltage (d) so all go off together
2. 2.💡 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 2 is taken out of its holder. How many bulbs glow?
3. 3.Which of these is true of a parallel circuit? (a) own switch for each bulb (b) one bulb out, all go out (c) a break stops every bulb (d) bulbs share the voltage
4. 4.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they get dimmer (d) they keep glowing
5. 5.💡 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. How many bulbs glow?
6. 6.Which of these is true of a series circuit? (a) each gets the full volts (b) used in house wiring (c) many paths for current (d) one bulb out, all go out
7. 7.Which of these is true of a series circuit? (a) one out, the rest glow (b) own switch for each bulb (c) used in house wiring (d) a break stops every bulb
8. 8.💡 5 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
9. 9.💡 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. Bulb 1 is taken out of its holder. Does bulb 4 glow? (a) Yes (b) No
10. 10.💡 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 5 and 6 are taken out of their holders. How many bulbs glow?
11. 11.💡 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 2 are taken out of their holders. How many bulbs glow?
12. 12.💡 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
13. 13.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
14. 14.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
15. 15.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a single current path (c) one out, the rest glow (d) a break stops every bulb
16. 16.💡 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. All the bulbs are in place. How many bulbs glow?
17. 17.💡 2 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
18. 18.True or false: “a single current path” is true of a series circuit. (a) False (b) True
19. 19.Which of these is true of a parallel circuit? (a) a single current path (b) each gets the full volts (c) one bulb out, all go out (d) bulbs share the voltage
20. 20.💡 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?
21. 21.💡 6 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
22. 22.💡 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
23. 23.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) used in house wiring (c) bulbs share the voltage (d) a single current path
24. 24.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
25. 25.💡 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. All the bulbs are in place. Does bulb 1 glow? (a) Yes (b) No
26. 26.Which of these is true of a series circuit? (a) each gets the full volts (b) many paths for current (c) used in house wiring (d) a single current path
27. 27.💡 2 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
28. 28.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
29. 29.💡 2 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
30. 30.💡 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. Does bulb 1 glow? (a) No (b) Yes
31. 31.💡 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
32. 32.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
33. 33.💡 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?
34. 34.💡 5 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
35. 35.💡 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?
36. 36.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
37. 37.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
38. 38.💡 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?
39. 39.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
40. 40.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False

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