Electronics Worksheet: Parallel Circuits

Electronics lesson 9: Parallel circuits · Set 168 · 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.💡 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?
3. 3.💡 5 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
4. 4.💡 5 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
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) the same (b) brighter (c) dimmer
6. 6.💡 5 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
7. 7.💡 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?
8. 8.💡 3 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
9. 9.💡 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?
10. 10.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
11. 11.💡 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?
12. 12.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) own switch for each bulb
13. 13.💡 A battery lights 5 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
14. 14.💡 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?
15. 15.Which of these is true of a series circuit? (a) own switch for each bulb (b) one out, the rest glow (c) a break stops every bulb (d) many paths for current
16. 16.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
17. 17.💡 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. Does bulb 6 glow? (a) No (b) Yes
18. 18.💡 3 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
19. 19.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
20. 20.Which of these is true of a parallel circuit? (a) a single current path (b) bulbs share the voltage (c) used in house wiring (d) a break stops every bulb
21. 21.💡 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
22. 22.💡 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?
23. 23.💡 2 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
24. 24.💡 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 2 and 6 are taken out of their holders. How many bulbs glow?
25. 25.💡 2 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
26. 26.💡 2 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
27. 27.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) one out, the rest glow
28. 28.💡 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. Does bulb 2 glow? (a) No (b) Yes
29. 29.Which of these is true of a parallel circuit? (a) each gets the full volts (b) a single current path (c) a break stops every bulb (d) one bulb out, all go out
30. 30.💡 4 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
31. 31.💡 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?
32. 32.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
33. 33.💡 3 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
34. 34.💡 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
35. 35.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
36. 36.Which of these is true of a series circuit? (a) many paths for current (b) a single current path (c) each gets the full volts (d) own switch for each bulb
37. 37.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
38. 38.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
39. 39.💡 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?
40. 40.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True

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