Electronics Worksheet: Parallel Circuits

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

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