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Science Project: by Jordan Barker

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on 11 April 2014

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Transcript of Science Project: by Jordan Barker

Science Project: by Jordan Barker
Question
Does electricity move better through thick wires or thin wires?
Hypothesis
I think that electricity will move better through the thick wire because electricity travels on the surface of wires and the thick wire has a bigger surface that will cause less electrical resistance.
Materials
Plastic straws
Scissors
Two D batteries
Electrical tape
Steel wool pad
Two new flashlight bulbs
Procedure
Get your batteries set up on a flat surface. One battery will get thin wire and the other will get thicker wire. Cut two pieces of straw the same as the battery.
Preparing the materials
Procedure (cont.)
Place the straw lengthwise onto the side of the battery and tape it with the electrical tape. Pull some strands of steel from the pad. Make a small pile of these on the side of the table
Pulling strands of steel wool to make wires
Procedure (cont.)
Take three strands of steel wool and use your fingers to roll them together into a thin wire. Take ten strands of steel wool and roll them together until they make a thicker wire.
Preparing the thin and thick wires
Procedure (cont.)
Put the thin wire through the middle of the straw on one battery and put the thick wire through the other straw. Tape one end of the thin wire to the negative end of the battery.
Taping the wire to the battery
Procedure (cont.)
Wrap the other end of the thin wire around the bottom of one of the flashlight bulbs. Tape it to the bulb with the electrical tape.
Connecting light bulb to the battery
Procedure (cont.)
Move the end of the light bulb down until it touches the positive side of the battery. Repeat with the thicker wire.
The bulbs are alit
Observations
The thin wire conducted electricity, but there was more electrical resistance. The thicker wire also conducted electricity but there was less electrical resistance.
Electrical Resistance Chart
Results
The bulb that was attached to the thicker wire was brighter, therefore my hypothesis was proven correct.
The bulb with the thicker wire is brighter.
Credits
Created and done by Jordan Barker

Pictures from Mrs. Barker
Full transcript