Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 290 · 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.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
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 1 is taken out of its holder. Does bulb 2 glow? (a) No (b) Yes
3. 3.💡 4 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
4. 4.💡 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
5. 5.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
6. 6.💡 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 3 are taken out of their holders. How many bulbs glow?
7. 7.💡 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 2 and 3 are taken out of their holders. Does bulb 4 glow? (a) No (b) Yes
8. 8.💡 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?
9. 9.Which of these is true of a series circuit? (a) many paths for current (b) own switch for each bulb (c) one out, the rest glow (d) one bulb out, all go out
10. 10.💡 6 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?
11. 11.Which of these is true of a series circuit? (a) bulbs share the voltage (b) each gets the full volts (c) own switch for each bulb (d) many paths for current
12. 12.💡 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. Bulbs 1 and 2 are taken out of their holders. How many bulbs glow?
13. 13.💡 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?
14. 14.💡 2 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
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 4 is taken out of its holder. How many bulbs glow?
16. 16.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
17. 17.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they get dimmer (c) they explode (d) they keep glowing
18. 18.💡 Why is house wiring done in parallel? (a) so all go off together (b) each gets full voltage (c) to make bulbs dim (d) to save copper only
19. 19.Which of these is true of a parallel circuit? (a) own switch for each bulb (b) bulbs share the voltage (c) one bulb out, all go out (d) a single current path
20. 20.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
21. 21.💡 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?
22. 22.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) many paths for current (c) bulbs share the voltage (d) a single current path
23. 23.Which of these is true of a series circuit? (a) many paths for current (b) used in house wiring (c) a single current path (d) one out, the rest glow
24. 24.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
25. 25.💡 3 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
26. 26.💡 5 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
27. 27.💡 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?
28. 28.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) bulbs share the voltage (c) one out, the rest glow (d) a single current path
29. 29.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
30. 30.💡 5 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
31. 31.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
32. 32.💡 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?
33. 33.💡 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. Bulbs 2 and 3 are taken out of their holders. How many bulbs glow?
34. 34.Which of these is true of a series circuit? (a) one out, the rest glow (b) many paths for current (c) used in house wiring (d) a break stops every bulb
35. 35.💡 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?
36. 36.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
37. 37.💡 5 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?
38. 38.💡 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 1 is taken out of its holder. Does bulb 2 glow? (a) No (b) Yes
39. 39.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
40. 40.💡 5 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =

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