Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 300 · 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. How many bulbs glow?
2. 2.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) used in house wiring (c) bulbs share the voltage (d) a break stops every bulb
3. 3.💡 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?
4. 4.💡 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?
5. 5.💡 4 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
6. 6.💡 6 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
7. 7.Which of these is true of a series circuit? (a) own switch for each bulb (b) a single current path (c) used in house wiring (d) one out, the rest glow
8. 8.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) each gets full voltage (c) so all go off together (d) to save copper only
9. 9.💡 3 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
10. 10.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
11. 11.💡 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
12. 12.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
13. 13.Which of these is true of a series circuit? (a) a break stops every bulb (b) own switch for each bulb (c) many paths for current (d) one out, the rest glow
14. 14.💡 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?
15. 15.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
16. 16.💡 2 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
17. 17.💡 5 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
18. 18.💡 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
19. 19.💡 2 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
20. 20.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
21. 21.True or false: “a break stops every bulb” 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) True (b) False
23. 23.Which of these is true of a series circuit? (a) one bulb out, all go out (b) used in house wiring (c) one out, the rest glow (d) each gets the full volts
24. 24.💡 3 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
25. 25.💡 2 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
26. 26.True or false: “a single current path” is true of a series circuit. (a) True (b) False
27. 27.💡 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?
28. 28.💡 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. Does bulb 3 glow? (a) No (b) Yes
29. 29.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
30. 30.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
31. 31.Which of these is true of a parallel circuit? (a) a single current path (b) one bulb out, all go out (c) bulbs share the voltage (d) many paths for current
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. Bulb 1 is taken out of its holder. How many bulbs glow?
33. 33.💡 2 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
34. 34.💡 5 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
35. 35.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
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 joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
38. 38.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
39. 39.💡 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 2 and 3 are taken out of their holders. How many bulbs glow?
40. 40.True or false: “many paths for current” is true of a series circuit. (a) False (b) True

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