Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 297 · 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 parallel circuit? (a) a single current path (b) own switch for each bulb (c) bulbs share the voltage (d) one bulb out, all go out
2. 2.Which of these is true of a series circuit? (a) bulbs share the voltage (b) own switch for each bulb (c) one out, the rest glow (d) many paths for current
3. 3.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
4. 4.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
5. 5.Which of these is true of a series circuit? (a) own switch for each bulb (b) a single current path (c) each gets the full volts (d) many paths for current
6. 6.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
7. 7.💡 4 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
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.💡 4 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
10. 10.💡 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?
11. 11.💡 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?
12. 12.💡 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?
13. 13.💡 6 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
14. 14.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to make bulbs dim (c) to save copper only (d) so all go off together
15. 15.💡 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
16. 16.Which of these is true of a series circuit? (a) each gets the full volts (b) one bulb out, all go out (c) many paths for current (d) one out, the rest glow
17. 17.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
18. 18.💡 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?
19. 19.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) bulbs share the voltage
20. 20.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
21. 21.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a break stops every bulb (c) many paths for current (d) a single current path
22. 22.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
23. 23.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
24. 24.💡 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 4 is taken out of its holder. Does bulb 5 glow? (a) Yes (b) No
25. 25.Which of these is true of a parallel circuit? (a) used in house wiring (b) a single current path (c) a break stops every bulb (d) one bulb out, all go out
26. 26.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
27. 27.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) a single current path (c) one bulb out, all go out (d) one out, the rest glow
28. 28.💡 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
29. 29.💡 3 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
30. 30.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
31. 31.💡 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?
32. 32.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
33. 33.💡 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 6 are taken out of their holders. Does bulb 5 glow? (a) Yes (b) No
34. 34.Which of these is true of a series circuit? (a) one out, the rest glow (b) a break stops every bulb (c) own switch for each bulb (d) many paths for current
35. 35.💡 4 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
36. 36.💡 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?
37. 37.💡 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) dimmer (c) the same
38. 38.💡 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. How many bulbs glow?
39. 39.💡 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
40. 40.💡 5 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?

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