Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 60 · 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.True or false: “a single current path” is true of a series circuit. (a) False (b) True
2. 2.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
3. 3.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) bulbs share the voltage (c) a single current path (d) each gets the full volts
4. 4.💡 5 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
5. 5.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) bulbs share the voltage (c) own switch for each bulb (d) a break stops every bulb
6. 6.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they all go out (c) they keep glowing (d) they explode
7. 7.Which of these is true of a series circuit? (a) many paths for current (b) a break stops every bulb (c) each gets the full volts (d) one out, the rest glow
8. 8.💡 Why is house wiring done in parallel? (a) to save copper only (b) so all go off together (c) to make bulbs dim (d) each gets full voltage
9. 9.💡 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 4 and 6 are taken out of their holders. How many bulbs glow?
10. 10.💡 A battery lights 5 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
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. Bulbs 2 and 5 are taken out of their holders. How many bulbs glow?
12. 12.💡 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 6 are taken out of their holders. How many bulbs glow?
13. 13.💡 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?
14. 14.💡 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?
15. 15.Which of these is true of a parallel circuit? (a) a single current path (b) a break stops every bulb (c) many paths for current (d) one bulb out, all go out
16. 16.💡 2 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
17. 17.Which of these is true of a series circuit? (a) each gets the full volts (b) own switch for each bulb (c) many paths for current (d) a single current path
18. 18.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
19. 19.💡 4 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?
20. 20.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
21. 21.💡 2 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
22. 22.Which of these is true of a series circuit? (a) own switch for each bulb (b) one out, the rest glow (c) one bulb out, all go out (d) many paths for current
23. 23.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
24. 24.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
25. 25.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) one out, the rest glow (c) bulbs share the voltage (d) a break stops every bulb
26. 26.💡 2 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
27. 27.💡 4 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
28. 28.💡 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 1 is taken out of its holder. How many bulbs glow?
29. 29.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
30. 30.Which of these is true of a parallel circuit? (a) a single current path (b) a break stops every bulb (c) bulbs share the voltage (d) used in house wiring
31. 31.💡 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 2 and 3 are taken out of their holders. 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.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
34. 34.💡 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. Bulb 6 is taken out of its holder. How many bulbs glow?
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) dimmer (b) the same (c) brighter
36. 36.💡 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
37. 37.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
38. 38.💡 4 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
39. 39.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
40. 40.💡 4 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =

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