Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 32 · 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.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they explode (c) they all go out (d) they keep glowing
2. 2.💡 4 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
3. 3.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a single current path (c) bulbs share the voltage (d) many paths for current
4. 4.💡 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
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) brighter (c) the same
6. 6.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
7. 7.Which of these is true of a parallel circuit? (a) own switch for each bulb (b) a break stops every bulb (c) one bulb out, all go out (d) bulbs share the voltage
8. 8.💡 Why is house wiring done in parallel? (a) so all go off together (b) each gets full voltage (c) to save copper only (d) to make bulbs dim
9. 9.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one bulb out, all go out (c) a single current path (d) used in house wiring
10. 10.💡 2 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
11. 11.💡 4 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
12. 12.Which of these is true of a series circuit? (a) one bulb out, all go out (b) one out, the rest glow (c) own switch for each bulb (d) many paths for current
13. 13.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
14. 14.💡 6 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
15. 15.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
16. 16.💡 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 3 is taken out of its holder. How many bulbs glow?
17. 17.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
18. 18.Which of these is true of a parallel circuit? (a) one out, the rest glow (b) a single current path (c) a break stops every bulb (d) one bulb out, all go out
19. 19.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
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. Bulbs 4 and 5 are taken out of their holders. How many bulbs glow?
21. 21.💡 4 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?
22. 22.💡 4 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
23. 23.💡 5 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
24. 24.Which of these is true of a series circuit? (a) used in house wiring (b) one out, the rest glow (c) own switch for each bulb (d) a break stops every bulb
25. 25.💡 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?
26. 26.💡 4 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
27. 27.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
28. 28.Which of these is true of a series circuit? (a) bulbs share the voltage (b) own switch for each bulb (c) each gets the full volts (d) one out, the rest glow
29. 29.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
30. 30.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
31. 31.💡 6 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 across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
33. 33.💡 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?
34. 34.💡 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?
35. 35.💡 2 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
36. 36.💡 5 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 joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulbs 3 and 5 are taken out of their holders. Does bulb 4 glow? (a) No (b) Yes
38. 38.💡 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) dimmer (c) the same
39. 39.Which of these is true of a series circuit? (a) one out, the rest glow (b) a single current path (c) many paths for current (d) own switch for each bulb
40. 40.💡 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?

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