Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 265 · 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) bulbs share the voltage (b) each gets the full volts (c) a single current path (d) one bulb out, all go out
2. 2.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
3. 3.💡 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
4. 4.Which of these is true of a parallel circuit? (a) used in house wiring (b) a break stops every bulb (c) bulbs share the voltage (d) a single current path
5. 5.💡 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
6. 6.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
7. 7.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
8. 8.Which of these is true of a series circuit? (a) used in house wiring (b) one out, the rest glow (c) a single current path (d) own switch for each bulb
9. 9.True or false: “a single current path” is true of a series circuit. (a) True (b) False
10. 10.💡 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 2 is taken out of its holder. 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) the same (c) dimmer
12. 12.Which of these is true of a series circuit? (a) one bulb out, all go out (b) each gets the full volts (c) own switch for each bulb (d) one out, the rest glow
13. 13.💡 6 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
14. 14.💡 4 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
15. 15.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) bulbs share the voltage (c) one out, the rest glow (d) a break stops every bulb
16. 16.💡 2 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
17. 17.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
18. 18.💡 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?
19. 19.💡 2 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
20. 20.💡 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
21. 21.Which of these is true of a series circuit? (a) own switch for each bulb (b) bulbs share the voltage (c) many paths for current (d) one out, the rest glow
22. 22.💡 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 4 are taken out of their holders. How many bulbs glow?
23. 23.💡 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
24. 24.💡 2 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
25. 25.💡 5 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
26. 26.💡 3 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
27. 27.Which of these is true of a parallel circuit? (a) a single current path (b) own switch for each bulb (c) a break stops every bulb (d) one bulb out, all go out
28. 28.💡 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 4 and 5 are taken out of their holders. How many bulbs glow?
29. 29.Which of these is true of a parallel circuit? (a) many paths for current (b) one bulb out, all go out (c) a break stops every bulb (d) a single current path
30. 30.Which of these is true of a series circuit? (a) used in house wiring (b) a break stops every bulb (c) one out, the rest glow (d) many paths for current
31. 31.💡 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?
32. 32.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
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.💡 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.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
36. 36.💡 2 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
37. 37.💡 2 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
38. 38.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
39. 39.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
40. 40.💡 4 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =

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