Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 48 · 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) own switch for each bulb (b) used in house wiring (c) one out, the rest glow (d) a break stops every bulb
2. 2.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
3. 3.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
4. 4.💡 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?
5. 5.💡 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?
6. 6.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) each gets full voltage (c) to save copper only (d) so all go off together
7. 7.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
8. 8.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
9. 9.💡 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?
10. 10.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
11. 11.💡 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 2 glow? (a) No (b) Yes
12. 12.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
13. 13.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
14. 14.Which of these is true of a series circuit? (a) own switch for each bulb (b) one out, the rest glow (c) many paths for current (d) bulbs share the voltage
15. 15.💡 5 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
16. 16.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
17. 17.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
18. 18.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
19. 19.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they keep glowing (c) they get dimmer (d) they explode
20. 20.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) a single current path (c) used in house wiring (d) one bulb out, all go out
21. 21.💡 2 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
22. 22.💡 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?
23. 23.💡 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?
24. 24.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
25. 25.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) many paths for current (c) a break stops every bulb (d) a single current path
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.💡 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) the same (c) dimmer
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) the same (b) dimmer (c) brighter
29. 29.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one bulb out, all go out (c) a break stops every bulb (d) one out, the rest glow
30. 30.💡 2 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
31. 31.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
32. 32.💡 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 1 is taken out of its holder. How many bulbs glow?
33. 33.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) a break stops every bulb
34. 34.💡 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 3 and 4 are taken out of their holders. How many bulbs glow?
35. 35.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
36. 36.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
37. 37.💡 3 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
38. 38.💡 3 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
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. Bulbs 1 and 2 are taken out of their holders. How many bulbs glow?
40. 40.True or false: “a single current path” is true of a series circuit. (a) False (b) True

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