Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 202 · 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.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
2. 2.💡 5 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
3. 3.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) to save copper only (c) each gets full voltage (d) so all go off together
4. 4.💡 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 4 and 5 are taken out of their holders. Does bulb 1 glow? (a) Yes (b) No
5. 5.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
6. 6.Which of these is true of a series circuit? (a) one out, the rest glow (b) own switch for each bulb (c) a single current path (d) many paths for current
7. 7.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
8. 8.💡 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 3 and 4 are taken out of their holders. How many bulbs glow?
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. How many bulbs glow?
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. Bulb 1 is taken out of its holder. Does bulb 5 glow? (a) No (b) Yes
11. 11.💡 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 1 is taken out of its holder. How many bulbs glow?
12. 12.💡 6 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?
13. 13.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) many paths for current (c) one bulb out, all go out (d) a single current path
14. 14.💡 3 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
15. 15.Which of these is true of a series circuit? (a) bulbs share the voltage (b) many paths for current (c) each gets the full volts (d) one out, the rest glow
16. 16.💡 3 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
17. 17.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they explode (c) they keep glowing (d) they all go out
18. 18.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a single current path (c) own switch for each bulb (d) one bulb out, all go out
19. 19.💡 4 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
20. 20.Which of these is true of a series circuit? (a) each gets the full volts (b) one out, the rest glow (c) own switch for each bulb (d) a break stops every bulb
21. 21.💡 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?
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) dimmer (b) brighter (c) the same
23. 23.True or false: “a single current path” is true of a series circuit. (a) True (b) False
24. 24.💡 6 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
25. 25.💡 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
26. 26.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
27. 27.Which of these is true of a series circuit? (a) one out, the rest glow (b) used in house wiring (c) each gets the full volts (d) one bulb out, all go out
28. 28.💡 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?
29. 29.💡 3 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
30. 30.💡 2 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
31. 31.💡 3 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
32. 32.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
33. 33.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
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. How many bulbs glow?
35. 35.💡 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?
36. 36.💡 4 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
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) dimmer (c) the same
38. 38.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
39. 39.💡 3 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
40. 40.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True

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