Christmas Light Webquest

Working with parallel and series circuits.

This project was a study on which circuit works better for a Christmas light strand that has gone bulb go out.

Testable Question

How does the type of circuit affect the strand of Christmas lights with a burned out bulb?

Independent Variable

The I.V. is the type of circuit used.

Dependent Variable

The D.V. is which bulbs work after one bulb doesn't.

Hypothesis

If Christmas lights are arranged in a parallel circuit then when 1 bulb bursts then the others will still light up and work.

Parallel Circuit Screenshot

This is a parallel circuit, which gives the current a choice of two ways to travel.

Observations

I observed that the more batteries I added, the faster the current went and the brighter the bulbs shined. Also I noticed that the current had two ways to travel instead of just one.

This is the same parallel circuit with a bulb missing

Observations

I observed that even when one bulb "burst" the parallel circuit still caused the others to work, which is ideal for your Christmas lights you put on your tree.

Hypothesis

If Christmas lights are arranged in a series circuit then when 1 bulb bursts the others will not work.

Series Circuit Screenshot

This is a series circuit, which only gives the current one way to travel.

Observations

I noticed that the light isn't as bright with just one battery. Also I observed that there is only one way to get the current through.

This is where bulb is disconnected from the rest, causing all other bulbs to stop working.

Observations

I observed that in a series circuit it only has one way to travel, causing all other bulbs to stop working.

Conclusion

I conclude that the parallel circuit will work best for a Christmas light strand

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