Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 190 · 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.💡 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
2. 2.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one bulb out, all go out (c) used in house wiring (d) bulbs share the voltage
3. 3.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they keep glowing (c) they explode (d) they get dimmer
4. 4.Which of these is true of a series circuit? (a) own switch for each bulb (b) one bulb out, all go out (c) many paths for current (d) used in house wiring
5. 5.💡 5 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
6. 6.💡 2 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
7. 7.Which of these is true of a parallel circuit? (a) own switch for each bulb (b) one bulb out, all go out (c) bulbs share the voltage (d) a single current path
8. 8.💡 2 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. How many bulbs glow?
9. 9.💡 2 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
10. 10.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
11. 11.💡 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?
12. 12.💡 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?
13. 13.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a single current path (c) each gets the full volts (d) bulbs share the voltage
14. 14.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
15. 15.Which of these is true of a series circuit? (a) many paths for current (b) one out, the rest glow (c) bulbs share the voltage (d) each gets the full volts
16. 16.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
17. 17.💡 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?
18. 18.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
19. 19.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
20. 20.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
21. 21.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) so all go off together (d) each gets full voltage
22. 22.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
23. 23.Which of these is true of a series circuit? (a) each gets the full volts (b) many paths for current (c) a single current path (d) used in house wiring
24. 24.💡 5 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
25. 25.💡 2 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
26. 26.💡 3 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
27. 27.💡 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?
28. 28.💡 2 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.💡 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) dimmer (c) the same
30. 30.💡 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?
31. 31.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
32. 32.💡 A battery lights 5 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
33. 33.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
34. 34.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
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. Bulb 5 is taken out of its holder. How many bulbs glow?
36. 36.💡 4 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
37. 37.💡 4 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
38. 38.Which of these is true of a parallel circuit? (a) a single current path (b) a break stops every bulb (c) one out, the rest glow (d) one bulb out, all go out
39. 39.💡 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
40. 40.💡 4 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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