Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 17 · 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.💡 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?
2. 2.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
3. 3.Which of these is true of a series circuit? (a) a break stops every bulb (b) own switch for each bulb (c) used in house wiring (d) many paths for current
4. 4.💡 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
5. 5.💡 4 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
6. 6.💡 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
7. 7.💡 5 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
8. 8.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
9. 9.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
10. 10.💡 6 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
11. 11.💡 2 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
12. 12.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
13. 13.💡 A battery lights 4 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
14. 14.💡 3 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
15. 15.💡 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) brighter (c) dimmer
16. 16.Which of these is true of a series circuit? (a) one out, the rest glow (b) a single current path (c) own switch for each bulb (d) used in house wiring
17. 17.💡 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 3 is taken out of its holder. How many bulbs glow?
18. 18.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
19. 19.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they explode (c) they all go out (d) they keep glowing
20. 20.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
21. 21.💡 5 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
22. 22.Which of these is true of a parallel circuit? (a) each gets the full volts (b) a single current path (c) bulbs share the voltage (d) one bulb out, all go out
23. 23.💡 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) the same (c) brighter
24. 24.Which of these is true of a series circuit? (a) one bulb out, all go out (b) many paths for current (c) used in house wiring (d) one out, the rest glow
25. 25.💡 4 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
26. 26.Which of these is true of a series circuit? (a) one out, the rest glow (b) each gets the full volts (c) many paths for current (d) bulbs share the voltage
27. 27.💡 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?
28. 28.💡 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?
29. 29.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
30. 30.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
31. 31.💡 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?
32. 32.💡 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?
33. 33.💡 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?
34. 34.💡 3 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
35. 35.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
36. 36.💡 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?
37. 37.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
38. 38.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
39. 39.💡 2 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
40. 40.Which of these is true of a parallel circuit? (a) own switch for each bulb (b) bulbs share the voltage (c) a break stops every bulb (d) a single current path

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