7April2014

Volts verses Current

Collecting data from a wire wrapped arounds a wood cylinder  in order to interpret the relation hip between amps and current in a closed circuit.

The top coil is form the lab table across from us and the coil on the bottom is from out lab table. We wanted to compare the results of both groups to see if there are in relationship in the current change. They are about the same coils wrapped around but our groups coils are spread out over the wood cylinder compared to theres which are packed to the right side of the cylinder as seen above.  

Comparing coil with Lab table next to us.

The graph represents the volts verses the current for both lab groups. Our data is in blue and their data is in red and the data and it is apparent that both groups produced a graph that shows the resistance as linear relationship between the current and the voltage. There resistance was higher at 23.319 ohm and our was lower at 16.14 ohms. This can be attributed to the material the wires are made or the number of coils given that they had as it appears in the picture above one extra loop. In addition the amp-meter used to measure this data may have a affect on the results also. But the main idea is that there is a linear relationship. 

Creating a Light with a Battery,Wire, and Bulb.

This picture shows the light created when a wire is used to close a circuit between the battery and light bulb to carry a current and create light.

Here we can see the battery gives the energy to the bulb and the bulb then uses the energy to create light. How cool is this? Super cool!! I will remember this at graduation! 

The wire helps to circulate the energy from battery or basically give a path for the electrons to  move.  

Resistance as a Function of Length

In this experiment we compared several different coils of varying diameters, resistance, and wire length. One was copper and rest were made of nickel silver we measured the resistance in all the coils and compared them by graphing the resistance as a function of length in order to determine a relationship between the diameter, resistance, and length. 

This graph shows the relationship of the data collected we have the corrected resistance of the y-axis and the increasing length of the wire on the x-axis. 

From the graph we can determine that the resistance is linearly proportional to the length of the wire. If we look at the last two points in the graph we can see the length is constant but the resistance is greater when the diameter is smaller therefor the resistance is inversely proportional to the diameter or the area of the wire. We determined the constant of proportionality to be the resistivity measured in (Ohm*meter).