Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 103 · 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.💡 4 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
2. 2.💡 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?
3. 3.💡 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 4 and 5 are taken out of their holders. How many bulbs glow?
4. 4.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
5. 5.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a single current path (c) many paths for current (d) a break stops every bulb
6. 6.💡 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 4 glow? (a) No (b) Yes
7. 7.💡 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. All the bulbs are in place. How many bulbs glow?
8. 8.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
9. 9.💡 Why is house wiring done in parallel? (a) to save copper only (b) so all go off together (c) to make bulbs dim (d) each gets full voltage
10. 10.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
11. 11.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
12. 12.Which of these is true of a series circuit? (a) many paths for current (b) one bulb out, all go out (c) own switch for each bulb (d) each gets the full volts
13. 13.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
14. 14.Which of these is true of a series circuit? (a) used in house wiring (b) one out, the rest glow (c) a single current path (d) many paths for current
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.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
17. 17.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they keep glowing (c) they get dimmer (d) they all go out
18. 18.Which of these is true of a series circuit? (a) many paths for current (b) used in house wiring (c) each gets the full volts (d) bulbs share the voltage
19. 19.💡 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?
20. 20.💡 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. How many bulbs glow?
21. 21.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
22. 22.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
23. 23.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) one out, the rest glow (c) a single current path (d) a break stops every bulb
24. 24.💡 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
25. 25.💡 5 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
26. 26.💡 A battery lights 5 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
27. 27.Which of these is true of a parallel circuit? (a) a single current path (b) own switch for each bulb (c) bulbs share the voltage (d) a break stops every bulb
28. 28.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
29. 29.💡 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?
30. 30.Which of these is true of a parallel circuit? (a) used in house wiring (b) bulbs share the voltage (c) a break stops every bulb (d) one bulb out, all go out
31. 31.💡 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?
32. 32.💡 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?
33. 33.💡 2 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
34. 34.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
35. 35.Which of these is true of a parallel circuit? (a) each gets the full volts (b) a single current path (c) a break stops every bulb (d) one bulb out, all go out
36. 36.💡 6 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?
37. 37.💡 3 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
38. 38.💡 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 2 is taken out of its holder. How many bulbs glow?
39. 39.💡 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?
40. 40.💡 4 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =

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