Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 127 · 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. All the bulbs are in place. Does bulb 2 glow? (a) No (b) Yes
2. 2.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
3. 3.💡 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?
4. 4.💡 A battery lights 5 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
5. 5.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
6. 6.💡 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
7. 7.Which of these is true of a series circuit? (a) a single current path (b) each gets the full volts (c) used in house wiring (d) many paths for current
8. 8.💡 3 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
9. 9.Which of these is true of a series circuit? (a) own switch for each bulb (b) many paths for current (c) used in house wiring (d) bulbs share the voltage
10. 10.💡 6 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?
11. 11.💡 A battery lights 3 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
12. 12.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
13. 13.💡 2 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
14. 14.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
15. 15.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) so all go off together (d) each gets full voltage
16. 16.💡 2 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
17. 17.Which of these is true of a series circuit? (a) used in house wiring (b) one bulb out, all go out (c) one out, the rest glow (d) own switch for each bulb
18. 18.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) a single current path (c) one bulb out, all go out (d) own switch for each bulb
19. 19.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
20. 20.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
21. 21.Which of these is true of a parallel circuit? (a) one out, the rest glow (b) one bulb out, all go out (c) a single current path (d) a break stops every bulb
22. 22.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) bulbs share the voltage (c) a single current path (d) used in house wiring
23. 23.💡 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 1 is taken out of its holder. How many bulbs glow?
24. 24.💡 4 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
25. 25.💡 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?
26. 26.💡 4 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
27. 27.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they get dimmer (d) they keep glowing
28. 28.True or false: “a single current path” is true of a series circuit. (a) True (b) False
29. 29.💡 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?
30. 30.💡 5 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
31. 31.💡 A battery lights 2 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
32. 32.💡 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) No (b) Yes
33. 33.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
34. 34.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a single current path (c) a break stops every bulb (d) each gets the full volts
35. 35.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
36. 36.💡 6 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?
37. 37.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
38. 38.💡 5 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
39. 39.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
40. 40.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True

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