Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 269 · 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.💡 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) Yes (b) No
2. 2.💡 Why is house wiring done in parallel? (a) to save copper only (b) each gets full voltage (c) to make bulbs dim (d) so all go off together
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) many paths for current
4. 4.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they explode (c) they all go out (d) they keep glowing
5. 5.💡 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 1 and 2 are taken out of their holders. How many bulbs glow?
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) a break stops every bulb (b) one bulb out, all go out (c) own switch for each bulb (d) bulbs share the voltage
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.💡 5 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
10. 10.True or false: “a single current path” is true of a series circuit. (a) True (b) False
11. 11.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
12. 12.Which of these is true of a series circuit? (a) a break stops every bulb (b) own switch for each bulb (c) one out, the rest glow (d) many paths for current
13. 13.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
14. 14.Which of these is true of a series circuit? (a) used in house wiring (b) one bulb out, all go out (c) own switch for each bulb (d) each gets the full volts
15. 15.Which of these is true of a series circuit? (a) a single current path (b) many paths for current (c) one out, the rest glow (d) own switch for each bulb
16. 16.💡 3 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
17. 17.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
18. 18.💡 A battery lights 4 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
19. 19.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
20. 20.💡 2 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
21. 21.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one out, the rest glow (c) a single current path (d) a break stops every bulb
22. 22.💡 5 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
23. 23.💡 3 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
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.💡 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?
26. 26.💡 6 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
27. 27.💡 3 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
28. 28.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
29. 29.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
30. 30.💡 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?
31. 31.💡 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?
32. 32.💡 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?
33. 33.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
34. 34.💡 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?
35. 35.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
36. 36.💡 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. Bulbs 2 and 3 are taken out of their holders. How many bulbs glow?
37. 37.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
38. 38.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
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.💡 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?

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