Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 16 · 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) each gets the full volts (b) a single current path (c) used in house wiring (d) many paths for current
2. 2.💡 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. Bulbs 1 and 3 are taken out of their holders. How many bulbs glow?
3. 3.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
4. 4.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
5. 5.💡 5 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
6. 6.💡 3 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
7. 7.💡 3 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
8. 8.💡 5 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
9. 9.💡 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) the same (c) dimmer
10. 10.💡 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
11. 11.Which of these is true of a series circuit? (a) own switch for each bulb (b) each gets the full volts (c) many paths for current (d) one bulb out, all go out
12. 12.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they keep glowing (c) they get dimmer (d) they all go out
13. 13.Which of these is true of a series circuit? (a) many paths for current (b) each gets the full volts (c) a break stops every bulb (d) used in house wiring
14. 14.💡 4 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
15. 15.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
16. 16.💡 5 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
17. 17.💡 5 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
18. 18.💡 3 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
19. 19.💡 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
20. 20.💡 2 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
21. 21.Which of these is true of a series circuit? (a) one out, the rest glow (b) many paths for current (c) bulbs share the voltage (d) each gets the full volts
22. 22.💡 2 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
23. 23.💡 A battery lights 4 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
24. 24.Which of these is true of a parallel circuit? (a) a single current path (b) used in house wiring (c) one bulb out, all go out (d) bulbs share the voltage
25. 25.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
26. 26.💡 3 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
27. 27.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
28. 28.💡 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?
29. 29.💡 5 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?
30. 30.💡 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 2 and 5 are taken out of their holders. How many bulbs glow?
31. 31.💡 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
32. 32.💡 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?
33. 33.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one bulb out, all go out (c) own switch for each bulb (d) a single current path
34. 34.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
35. 35.💡 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 1 and 3 are taken out of their holders. Does bulb 4 glow? (a) No (b) Yes
36. 36.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
37. 37.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
38. 38.💡 2 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
39. 39.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) bulbs share the voltage
40. 40.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False

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