Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 30 · 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.💡 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
2. 2.💡 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?
3. 3.💡 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?
4. 4.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
5. 5.💡 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
6. 6.Which of these is true of a series circuit? (a) own switch for each bulb (b) one out, the rest glow (c) used in house wiring (d) a break stops every bulb
7. 7.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
8. 8.💡 2 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
9. 9.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
10. 10.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
11. 11.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
12. 12.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
13. 13.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to make bulbs dim (c) to save copper only (d) so all go off together
14. 14.Which of these is true of a series circuit? (a) own switch for each bulb (b) many paths for current (c) one out, the rest glow (d) bulbs share the voltage
15. 15.Which of these is true of a parallel circuit? (a) own switch for each bulb (b) a break stops every bulb (c) a single current path (d) bulbs share the voltage
16. 16.💡 5 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
17. 17.💡 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 2 is taken out of its holder. How many bulbs glow?
18. 18.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
19. 19.Which of these is true of a parallel circuit? (a) a single current path (b) a break stops every bulb (c) one bulb out, all go out (d) used in house wiring
20. 20.Which of these is true of a parallel circuit? (a) many paths for current (b) a break stops every bulb (c) bulbs share the voltage (d) a single current path
21. 21.💡 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?
22. 22.Which of these is true of a series circuit? (a) each gets the full volts (b) one out, the rest glow (c) many paths for current (d) one bulb out, all go out
23. 23.💡 3 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
24. 24.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
25. 25.💡 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?
26. 26.💡 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?
27. 27.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
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. Does bulb 2 glow? (a) No (b) Yes
29. 29.💡 4 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
30. 30.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
31. 31.💡 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
32. 32.💡 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?
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 in parallel and each bulb has its own switch on its path. 4 of the switches are OFF and the rest are ON. How many bulbs glow?
35. 35.💡 3 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
36. 36.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
37. 37.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
38. 38.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
39. 39.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
40. 40.💡 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) the same (c) dimmer

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