Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 216 · 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.Which of these is true of a series circuit? (a) many paths for current (b) one out, the rest glow (c) own switch for each bulb (d) bulbs share the voltage
2. 2.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one out, the rest glow (c) one bulb out, all go out (d) a single current path
3. 3.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
4. 4.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they all go out (c) they keep glowing (d) they explode
5. 5.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) each gets full voltage (d) to make bulbs dim
6. 6.Which of these is true of a parallel circuit? (a) each gets the full volts (b) a break stops every bulb (c) one bulb out, all go out (d) a single current path
7. 7.💡 3 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
8. 8.💡 5 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
9. 9.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
10. 10.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
11. 11.💡 3 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
12. 12.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) a break stops every bulb
13. 13.💡 4 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
14. 14.💡 3 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
15. 15.💡 2 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
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.💡 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
18. 18.💡 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) brighter (c) dimmer
19. 19.💡 4 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
20. 20.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
21. 21.Which of these is true of a parallel circuit? (a) a single current path (b) a break stops every bulb (c) many paths for current (d) one bulb out, all go out
22. 22.💡 4 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
23. 23.💡 6 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
24. 24.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
25. 25.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
26. 26.💡 4 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
27. 27.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
28. 28.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
29. 29.💡 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 1 and 4 are taken out of their holders. Does bulb 3 glow? (a) No (b) Yes
30. 30.💡 6 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
31. 31.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
32. 32.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) used in house wiring (c) a single current path (d) bulbs share the voltage
33. 33.💡 6 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.💡 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?
35. 35.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
36. 36.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
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) the same (b) dimmer (c) brighter
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. Bulb 2 is taken out of its holder. How many bulbs glow?
40. 40.💡 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?

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