Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 263 · 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.💡 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?
2. 2.💡 2 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
3. 3.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
4. 4.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
5. 5.💡 2 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
6. 6.💡 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?
7. 7.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they get dimmer (c) they explode (d) they keep glowing
8. 8.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
9. 9.Which of these is true of a series circuit? (a) a break stops every bulb (b) one out, the rest glow (c) each gets the full volts (d) own switch for each bulb
10. 10.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
11. 11.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
12. 12.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
13. 13.💡 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?
14. 14.💡 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 2 is taken out of its holder. How many bulbs glow?
15. 15.💡 5 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
16. 16.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
17. 17.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) each gets the full volts (c) a break stops every bulb (d) bulbs share the voltage
18. 18.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
19. 19.💡 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?
20. 20.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
21. 21.Which of these is true of a series circuit? (a) used in house wiring (b) a single current path (c) each gets the full volts (d) many paths for current
22. 22.💡 5 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?
23. 23.💡 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) Yes (b) No
24. 24.💡 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
25. 25.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
26. 26.💡 2 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
27. 27.Which of these is true of a parallel circuit? (a) used in house wiring (b) one bulb out, all go out (c) bulbs share the voltage (d) a break stops every bulb
28. 28.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a single current path (c) one out, the rest glow (d) a break stops every bulb
29. 29.💡 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) the same (c) dimmer
30. 30.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
31. 31.💡 3 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
32. 32.💡 5 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
33. 33.💡 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
34. 34.💡 3 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
35. 35.💡 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 2 and 4 are taken out of their holders. How many bulbs glow?
36. 36.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) many paths for current (c) a single current path (d) one bulb out, all go out
37. 37.Which of these is true of a series circuit? (a) one out, the rest glow (b) many paths for current (c) used in house wiring (d) one bulb out, all go out
38. 38.💡 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. Does bulb 2 glow? (a) Yes (b) No
39. 39.💡 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?
40. 40.💡 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?

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