Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 222 · 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) each gets full voltage (d) so all go off together
2. 2.💡 2 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
3. 3.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a single current path (c) one bulb out, all go out (d) used in house wiring
4. 4.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they keep glowing (c) they explode (d) they all go out
5. 5.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
6. 6.Which of these is true of a parallel circuit? (a) one out, the rest glow (b) a break stops every bulb (c) bulbs share the voltage (d) a single current path
7. 7.💡 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?
8. 8.💡 6 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
9. 9.💡 4 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
10. 10.Which of these is true of a parallel circuit? (a) a single current path (b) a break stops every bulb (c) each gets the full volts (d) bulbs share the voltage
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.💡 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) brighter (c) the same
13. 13.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
14. 14.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
15. 15.💡 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. Bulb 2 is taken out of its holder. How many bulbs glow?
16. 16.Which of these is true of a series circuit? (a) bulbs share the voltage (b) many paths for current (c) one out, the rest glow (d) own switch for each bulb
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. Bulb 1 is taken out of its holder. How many bulbs glow?
18. 18.💡 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 1 is taken out of its holder. Does bulb 3 glow? (a) Yes (b) No
19. 19.Which of these is true of a series circuit? (a) many paths for current (b) one out, the rest glow (c) one bulb out, all go out (d) used in house wiring
20. 20.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
21. 21.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
22. 22.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) bulbs share the voltage (c) a single current path (d) own switch for each bulb
23. 23.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
24. 24.💡 4 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
25. 25.💡 4 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
26. 26.💡 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. All the bulbs are in place. How many bulbs glow?
27. 27.💡 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?
28. 28.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a break stops every bulb (c) one bulb out, all go out (d) many paths for current
29. 29.💡 4 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
30. 30.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
31. 31.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
32. 32.💡 5 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
33. 33.💡 5 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
34. 34.💡 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) the same (c) dimmer
35. 35.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
36. 36.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
37. 37.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
38. 38.Which of these is true of a series circuit? (a) one out, the rest glow (b) own switch for each bulb (c) each gets the full volts (d) a single current path
39. 39.💡 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?
40. 40.💡 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 4 are taken out of their holders. How many bulbs glow?

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