Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 21 · 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.Which of these is true of a parallel circuit? (a) one out, the rest glow (b) bulbs share the voltage (c) one bulb out, all go out (d) a single current path
2. 2.💡 6 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?
3. 3.💡 Why is house wiring done in parallel? (a) so all go off together (b) each gets full voltage (c) to make bulbs dim (d) to save copper only
4. 4.Which of these is true of a series circuit? (a) each gets the full volts (b) one bulb out, all go out (c) used in house wiring (d) own switch for each bulb
5. 5.Which of these is true of a parallel circuit? (a) used in house wiring (b) one bulb out, all go out (c) a break stops every bulb (d) a single current path
6. 6.Which of these is true of a series circuit? (a) own switch for each bulb (b) bulbs share the voltage (c) each gets the full volts (d) one out, the rest glow
7. 7.Which of these is true of a series circuit? (a) own switch for each bulb (b) one out, the rest glow (c) many paths for current (d) a break stops every bulb
8. 8.💡 2 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
9. 9.True or false: “a single current path” is true of a series circuit. (a) False (b) True
10. 10.💡 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 2 is taken out of its holder. How many bulbs glow?
11. 11.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
12. 12.💡 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 4 is taken out of its holder. Does bulb 1 glow? (a) No (b) Yes
13. 13.💡 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
14. 14.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
15. 15.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
16. 16.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
17. 17.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
18. 18.💡 5 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
19. 19.💡 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 3 and 4 are taken out of their holders. Does bulb 2 glow? (a) Yes (b) No
20. 20.💡 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 3 is taken out of its holder. How many bulbs glow?
21. 21.💡 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) the same (c) dimmer
22. 22.💡 5 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?
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. Bulbs 1 and 4 are taken out of their holders. How many bulbs glow?
24. 24.💡 3 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?
25. 25.💡 3 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
26. 26.💡 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?
27. 27.💡 4 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
28. 28.💡 5 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
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) dimmer (c) the same
30. 30.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
31. 31.💡 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?
32. 32.💡 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?
33. 33.Which of these is true of a parallel circuit? (a) many paths for current (b) a single current path (c) one bulb out, all go out (d) bulbs share the voltage
34. 34.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
35. 35.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
36. 36.💡 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?
37. 37.💡 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) dimmer (c) the same
38. 38.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
39. 39.Which of these is true of a series circuit? (a) a single current path (b) one out, the rest glow (c) each gets the full volts (d) many paths for current
40. 40.💡 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?

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