Electronics Worksheet: Parallel Circuits

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