Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 1 · 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.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) to save copper only (c) so all go off together (d) each gets full voltage
2. 2.💡 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?
3. 3.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
4. 4.💡 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
5. 5.Which of these is true of a series circuit? (a) each gets the full volts (b) a single current path (c) own switch for each bulb (d) many paths for current
6. 6.💡 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?
7. 7.💡 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?
8. 8.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
9. 9.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a break stops every bulb (c) used in house wiring (d) bulbs share the voltage
10. 10.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
11. 11.Which of these is true of a series circuit? (a) many paths for current (b) own switch for each bulb (c) used in house wiring (d) one bulb out, all go out
12. 12.Which of these is true of a series circuit? (a) many paths for current (b) each gets the full volts (c) a break stops every bulb (d) one out, the rest glow
13. 13.💡 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 4 is taken out of its holder. How many bulbs glow?
14. 14.💡 3 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
15. 15.Which of these is true of a series circuit? (a) bulbs share the voltage (b) each gets the full volts (c) own switch for each bulb (d) one out, the rest glow
16. 16.💡 4 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
17. 17.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
18. 18.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
19. 19.💡 2 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
20. 20.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
21. 21.💡 5 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
22. 22.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
23. 23.💡 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. Does bulb 1 glow? (a) Yes (b) No
24. 24.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) one out, the rest glow
25. 25.💡 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. All the bulbs are in place. Does bulb 1 glow? (a) No (b) Yes
26. 26.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they all go out (c) they explode (d) they get dimmer
27. 27.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
28. 28.Which of these is true of a parallel circuit? (a) own switch for each bulb (b) a break stops every bulb (c) one bulb out, all go out (d) bulbs share the voltage
29. 29.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
30. 30.💡 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
31. 31.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
32. 32.💡 6 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
33. 33.True or false: “a single current path” is true of a series circuit. (a) False (b) True
34. 34.💡 4 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
35. 35.💡 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. How many bulbs glow?
36. 36.💡 A battery lights 2 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
37. 37.💡 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?
38. 38.💡 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?
39. 39.💡 4 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
40. 40.💡 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 2 are taken out of their holders. How many bulbs glow?

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