Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 54 · 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.Which of these is true of a parallel circuit? (a) a single current path (b) each gets the full volts (c) bulbs share the voltage (d) one bulb out, all go out
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. All the bulbs are in place. Does bulb 1 glow? (a) Yes (b) No
3. 3.Which of these is true of a series circuit? (a) many paths for current (b) a break stops every bulb (c) own switch for each bulb (d) each gets the full volts
4. 4.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) to make bulbs dim (d) each gets full voltage
5. 5.💡 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
6. 6.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they explode (c) they all go out (d) they get dimmer
7. 7.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
8. 8.💡 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?
9. 9.Which of these is true of a parallel circuit? (a) one out, the rest glow (b) one bulb out, all go out (c) a break stops every bulb (d) a single current path
10. 10.True or false: “a single current path” is true of a series circuit. (a) False (b) True
11. 11.💡 3 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
12. 12.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
13. 13.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
14. 14.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
15. 15.💡 2 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
16. 16.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) bulbs share the voltage (c) used in house wiring (d) a single current path
17. 17.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
18. 18.💡 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?
19. 19.💡 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 3 is taken out of its holder. How many bulbs glow?
20. 20.💡 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. Bulb 4 is taken out of its holder. How many bulbs glow?
21. 21.💡 5 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
22. 22.💡 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?
23. 23.Which of these is true of a series circuit? (a) one out, the rest glow (b) one bulb out, all go out (c) each gets the full volts (d) own switch for each bulb
24. 24.Which of these is true of a series circuit? (a) many paths for current (b) each gets the full volts (c) bulbs share the voltage (d) own switch for each bulb
25. 25.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
26. 26.💡 4 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
27. 27.💡 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?
28. 28.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) own switch for each bulb (c) one bulb out, all go out (d) a single current path
29. 29.💡 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?
30. 30.💡 2 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
31. 31.💡 4 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
32. 32.💡 A battery lights 2 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
33. 33.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
34. 34.💡 2 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
35. 35.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
36. 36.Which of these is true of a parallel circuit? (a) a single current path (b) bulbs share the voltage (c) one bulb out, all go out (d) many paths for current
37. 37.💡 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?
38. 38.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
39. 39.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
40. 40.💡 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 1 and 2 are taken out of their holders. How many bulbs glow?

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