Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 19 · 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 keep glowing (b) they all go out (c) they get dimmer (d) they explode
2. 2.💡 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?
3. 3.💡 3 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
4. 4.💡 5 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
5. 5.💡 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
6. 6.💡 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?
7. 7.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one bulb out, all go out (c) a single current path (d) own switch for each bulb
8. 8.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
9. 9.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
10. 10.True or false: “a single current path” is true of a series circuit. (a) False (b) True
11. 11.💡 5 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
12. 12.💡 Why is house wiring done in parallel? (a) to save copper only (b) so all go off together (c) each gets full voltage (d) to make bulbs dim
13. 13.💡 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 6 are taken out of their holders. How many bulbs glow?
14. 14.💡 3 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
15. 15.Which of these is true of a series circuit? (a) one out, the rest glow (b) own switch for each bulb (c) a single current path (d) many paths for current
16. 16.Which of these is true of a series circuit? (a) a break stops every bulb (b) own switch for each bulb (c) used in house wiring (d) one out, the rest glow
17. 17.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) many paths for current (c) a single current path (d) one bulb out, all go out
18. 18.💡 2 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
19. 19.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
20. 20.💡 6 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
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.💡 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?
23. 23.Which of these is true of a series circuit? (a) one out, the rest glow (b) each gets the full volts (c) bulbs share the voltage (d) many paths for current
24. 24.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
25. 25.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
26. 26.💡 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?
27. 27.💡 3 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
28. 28.💡 4 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
29. 29.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
30. 30.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
31. 31.Which of these is true of a parallel circuit? (a) one out, the rest glow (b) a single current path (c) bulbs share the voltage (d) a break stops every bulb
32. 32.💡 A battery lights 4 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
33. 33.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a single current path (c) used in house wiring (d) a break stops every bulb
34. 34.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
35. 35.💡 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 3 is taken out of its holder. Does bulb 4 glow? (a) No (b) Yes
36. 36.💡 6 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
37. 37.Which of these is true of a series circuit? (a) each gets the full volts (b) used in house wiring (c) many paths for current (d) one bulb out, all go out
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.💡 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?
40. 40.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a break stops every bulb (c) each gets the full volts (d) one bulb out, all go out

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