Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 109 · 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.💡 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?
2. 2.Which of these is true of a series circuit? (a) one bulb out, all go out (b) one out, the rest glow (c) own switch for each bulb (d) many paths for current
3. 3.💡 6 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
4. 4.💡 5 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
5. 5.💡 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
6. 6.💡 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
7. 7.Which of these is true of a series circuit? (a) bulbs share the voltage (b) used in house wiring (c) many paths for current (d) own switch for each bulb
8. 8.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a single current path (c) one bulb out, all go out (d) own switch for each bulb
9. 9.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) so all go off together (c) each gets full voltage (d) to save copper only
10. 10.💡 3 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
11. 11.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
12. 12.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
13. 13.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
14. 14.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one out, the rest glow (c) bulbs share the voltage (d) a single current path
15. 15.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
16. 16.💡 2 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
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.💡 2 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
19. 19.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) bulbs share the voltage (c) many paths for current (d) a single current path
20. 20.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they get dimmer (c) they keep glowing (d) they explode
21. 21.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
22. 22.💡 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?
23. 23.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
24. 24.💡 2 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
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.💡 3 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
27. 27.💡 3 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
28. 28.💡 5 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
29. 29.💡 5 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
30. 30.💡 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?
31. 31.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
32. 32.💡 3 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
33. 33.💡 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. All the bulbs are in place. Does bulb 1 glow? (a) No (b) Yes
34. 34.True or false: “a single current path” is true of a series circuit. (a) False (b) True
35. 35.💡 A battery lights 3 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
36. 36.Which of these is true of a series circuit? (a) many paths for current (b) each gets the full volts (c) a single current path (d) one out, the rest 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) dimmer (b) brighter (c) the same
38. 38.Which of these is true of a series circuit? (a) each gets the full volts (b) a break stops every bulb (c) one out, the rest glow (d) many paths for current
39. 39.💡 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. Does bulb 1 glow? (a) No (b) Yes
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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