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physics papper

# physics papper - circuit is where that current travels...

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Samantha Muller Dr. J.R. Anderson Physics 104 November 29, 2011 Behind the scenes of Holiday Lights It starts the day after thanksgiving and continues until new years, the holiday season is filled with joy, laughter and tradition. Driving through any neighborhood one will come across the brightly lit homes that notify all that the holidays are here once again. It is an American tradition that homes are lit up in lights during these two months of the year. But how do Christmas lights work? How do the strands of little light bulbs eluminate for so long even if one bulb goes out? There are two possible ways to wire Christmas lights. One is through a parallel circuit in which one bulbs failure has no impact on the rest of the lights. The bulbs are wired one beside the other so they all connect to the same pair of wires, two wire carry the electricity through each bulb. In a parallel circuit the lights have the same potential difference across the strand. The second way is through a series circuit, which is the most common kind today because of its low cost. A series

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Unformatted text preview: circuit is where that current travels through all the lights in the strand. In this case if you remove one bulb they will all go out because there is a break in the series flow, and the current is cut off. But if you were to break one of the blubs and leave it in the circuit the lights will stay on because the connection is still in tact. This occurs because in a series circuit there is a third wire running along the strand of lights and this wire acts as a parallel type circuit so that the lights will stay on even if one blub breaks. Ohms law helps explain these holiday lights in stating that the proportionality constant is the resistance, the change in potential across the lights in the circuit are proportional to the current going through the lights. Physics explains how each little bulb on the huge strand of lights works throughout each holiday season that come around. Parallel Circuit Series Circuit Picture found at - http://people.howstuffworks.com...
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physics papper - circuit is where that current travels...

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