Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 232 · 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 3 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
2. 2.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
3. 3.Which of these is true of a series circuit? (a) own switch for each bulb (b) used in house wiring (c) one bulb out, all go out (d) one out, the rest glow
4. 4.💡 2 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
5. 5.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they all go out (c) they get dimmer (d) they keep glowing
6. 6.💡 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?
7. 7.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
8. 8.💡 2 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
9. 9.Which of these is true of a series circuit? (a) own switch for each bulb (b) each gets the full volts (c) many paths for current (d) a single current path
10. 10.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
11. 11.True or false: “own switch for each 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 parallel circuit. (a) True (b) False
13. 13.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) each gets full voltage (d) to make bulbs dim
14. 14.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
15. 15.💡 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?
16. 16.💡 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?
17. 17.💡 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?
18. 18.💡 A battery lights 2 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
19. 19.Which of these is true of a parallel circuit? (a) a single current path (b) used in house wiring (c) bulbs share the voltage (d) one bulb out, all go out
20. 20.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
21. 21.💡 3 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
22. 22.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
23. 23.💡 5 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
24. 24.💡 2 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
25. 25.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one bulb out, all go out (c) a break stops every bulb (d) one out, the rest glow
26. 26.💡 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 1 and 5 are taken out of their holders. How many bulbs glow?
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.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
29. 29.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
30. 30.💡 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 2 is taken out of its holder. How many bulbs glow?
31. 31.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a break stops every bulb (c) many paths for current (d) bulbs share the voltage
32. 32.💡 2 identical bulbs are in parallel and each one takes 0.2 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) True (b) False
34. 34.💡 2 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
35. 35.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
36. 36.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
37. 37.💡 5 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
38. 38.Which of these is true of a series circuit? (a) one out, the rest glow (b) used in house wiring (c) each gets the full volts (d) a break stops every bulb
39. 39.💡 2 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
40. 40.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True

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