042814 Physics 4b*

This was a picture of the experiment of how a capacitor will work when it is charged and discharged on a Christmas light.

This is a picture of the apparatus  we used to calculated its charging and discharging. Not included was picture of computer using logger pro.

The C value from the graph is experimental value and calculated value is on the calculator. In comparison they are close. Using the average of the C 0.06373. Calculated value of 0.06711. The percent error is 5.04% error.

This is the picture of the graph of the charging and discharging of the capacitor. The blue line represents the charging and green represents the discharging of the capacitor. This graph also means that the charge is not linear but exponentially.

042114 Physics 4b

Experiment: Making a capacitor out of aluminum paper 

Aluminum sheet apparatus 

Due to the nature of the papers we calculated the k constant of paper. The K value was 3.5 which is correct because 1 would be a vacuum. The chart to the left displays the calculation of the capacitance of the aluminum sheet. The calculated C = K*epsilon*Area/ distance between the sheets.  

The graph displays the capacity versus distance between the sheets.  The graph means that the closer the distance the higher the capacitance. The is with a full area of aluminum (area calculated above)

The graph is similar to the graph with full area. The difference between this graph and the previous would be the amount of capacitance is less.

Two capacitors 

Good note for Capcitors would be that in parallel they add and in series they inverse add = (1/Cend= 1/C1 +1/C2)

041614 Physics 4b

Today started with the difference between putting bulbs and batteries in parallel and in series.

This part of the class was depicting the value of resistance depending of the color

picture of Different resistors 

This is the problem we are trying to solve for displayed below is the diagram 

Problem

100 and 150 are in series therefore we would add them together 250 ohms 

250 and 100 are parallel resulting in 67 ohms 

67 ohms and 100 ohms are in series resulting in 167 ohms 

167 and 75 are in parallel then the result is 51.74 ohms 

Our result from the pictures above proven with 51.9 which is very close to what we had 

Chat of how to solve a diagram 

This is a new diagram now we are solving for the ampere  

We are given three different unknowns. The math is incorrect but our first process was to find I(1) then solve for I(2) then the result of those two will be I(3). 

041414 Physics 4b

Experiment  Electric Potential Lab/ Activity 

Picture of Apparatus:  

This data chart displays the position of the red probe from the black probe. The black probe remained stationary at the silver circle. Every cross on the black paper is distance one cm away. The Voltage increased as the red probe came closer to the silver line. 13-17 the voltage began to decrease.

This is a graph of Voltage versus Distance. The graph displays an exponential curve. This means that the closer it got to the silver line the higher the voltage.   

This is a chart of a charge a distance away from a ring. The values to the left is a constant radius away. The Voltage is a result of how the integral of the electrical field. The next column has a change in radius. This is different from the first column because the charge is constant distance away from the top of the ring, therefore the distance from the charge with the ring is changing .

  

040914 Physics 4B

Today started with a quiz on displaying a bright or dim setting. Our part of the quiz was to display a bright setting. Unfortunately, we were unsuccessful. To get a bright setting a person would put the batteries in series to and line the light bulbs parallel. To get the dim setting a person would put the batteries in series but would put the light bulbs in series also to make the power go through more wires.

 Quiz Apparatus  

Water experiment calculations 

 This graph shows the change of temperature in the water. Blue using the 9V and Red using the 4.5V 

This the list of values given during the experiment 

Experiment 1 Calculations                                          Experiment 2 Calculations 

For the first experiment with using 4.5V the change in temperature was  2.45 +/- 1.25 degree C/ kelvin
For the second experiment with 9V the change in temperature was 9.79+/- 5.00 degrees C/ Kelvin. A person would guess that doubling the voltage would double the change in temperature but this it not the case it is roughly 1: 5. This could be from the the greater difference between the voltage and the resistance in the wire. This gap increased the power with in turn increased the change in t temperature

The last experiment was  cooking of the Hot dog. Using the out let two cook the hotdog it would be the equivalent of a person absorbing that same amount of voltage. On top were three Green LEDs with varying distance small medium and large separation of the anode and cathode. According to the experiment the larger the gap between the anode and cathode the brighter the LED.    

040714 Physics 4B

Volts versus current 

This is a comparison of different wires. Initially our wire had more length then another group that had a smaller wire. The data above depicts the material and supplies we used in this experiment. The graph on the left depicts that the longer the length the larger the resistance. The graph on the right depicts that the larger the area the more resistance.  

The data above is a comparison of two different spools of wire that we calculated. group one (our group) had a longer spool then the other groups.

The chart above depicts a volts versus Current graph. The top line would be the ours groups larger spool because it was able to display a larger slope. The line below depicts the other spool because its displays a smaller slope predicting less resistance.

The picture is the materials used in the experiment to measure volts and amps