Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 275 · 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.💡 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 6 is taken out of its holder. How many bulbs glow?
2. 2.💡 A battery lights 4 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
3. 3.💡 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 3 is taken out of its holder. How many bulbs glow?
4. 4.Which of these is true of a parallel circuit? (a) used in house wiring (b) one bulb out, all go out (c) a single current path (d) bulbs share the voltage
5. 5.💡 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) the same (c) brighter
6. 6.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
7. 7.💡 3 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
8. 8.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) to save copper only (c) each gets full voltage (d) so all go off together
9. 9.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
10. 10.💡 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?
11. 11.💡 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
12. 12.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
13. 13.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) one out, the rest glow
14. 14.💡 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) brighter (c) dimmer
15. 15.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) each gets the full volts (c) a single current path (d) a break stops every bulb
16. 16.💡 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?
17. 17.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
18. 18.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
19. 19.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they explode (c) they keep glowing (d) they all go out
20. 20.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
21. 21.💡 2 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
22. 22.Which of these is true of a parallel circuit? (a) a single current path (b) a break stops every bulb (c) bulbs share the voltage (d) one out, the rest glow
23. 23.Which of these is true of a series circuit? (a) each gets the full volts (b) one bulb out, all go out (c) one out, the rest glow (d) many paths for current
24. 24.💡 5 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
25. 25.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) own switch for each bulb (c) a single current path (d) bulbs share the voltage
26. 26.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
27. 27.Which of these is true of a series circuit? (a) own switch for each bulb (b) bulbs share the voltage (c) one out, the rest glow (d) used in house wiring
28. 28.True or false: “a single current path” is true of a series circuit. (a) True (b) False
29. 29.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
30. 30.💡 2 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
31. 31.💡 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 1 is taken out of its holder. Does bulb 3 glow? (a) No (b) Yes
32. 32.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
33. 33.💡 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?
34. 34.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
35. 35.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
36. 36.💡 4 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
37. 37.💡 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?
38. 38.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
39. 39.💡 6 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
40. 40.💡 4 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =

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