Day 12 Lab 04/09/14

Electric Circuits and Potential:

In this lab experiment we were to make a circuit to be able to make a light dim and the other groups brighter just by the way or rearranging the wires and the elements of a circuit. Another experiment we did was putting a heater with resistance in  water cup and calculate the variables needed to find the voltage potential. And the last experiment was seeing the actual relationship with the length and power given because when the LD light had a bigger distance between wires we expected the light to be more bright due to the larger electric potential.

In order to make the bulb as dim as it can possibly can we arranged the circuit by placing the batteries into parallel and the bulbs into series as shown in the image. We were able to use the prior knowledge to have an understanding why certain positions in the circuit can have a different outcome in current and voltage.

The next part of the lab was by placing the heater in a water cup and using what was given at first to find the resistance which then we were able to find the voltage potential. Also how when the voltage changes the whole numbers in the calculations change because each one has a different current.

This image shows the calculations of the experiment were it was used to find the rest of the values by finding each value to find the other values in the system. Then the voltage changed by being doubled causing the numbers to change not just by doubling each value, which was apparently not and shows the relationship with mass and potential. 

This shows the uncertainty of the calculations from the image above which shows that the inconsistency was in with the mass of the water and the amount of power. 

This is the image of the graph from the experiment showing the difference in potential for the ten minutes it was ran. And shows how potential was changing throughout the experiment, the blue graph had a higher temperature change with also changes in the shape. 

This shows an example done in class with only gravitational lines going through the system shown in the image, and as a result we saw that the work was the same for the system because work is path independent  and each path is required from A to C.  

This an example done in class of the voltage potential where there is two point charges among an axis and we were to use the new knowledge we obtained from the prior experiment to see the relationships of the problem and come to a solution of the problem.

This is the other part of the problem in the image before find each part of the problem to find each solution of the problem and found the velocity in the end.

 Next part of the experiment was a demo of a hot dog connected between two charged ends causing it to flow within the hotdog and showing the voltage is moved from one end to the other. Then three LD lights were placed in the hot dog with different distances between their wires, short, medium and a large distance. Knowing what we know from potential we predicted that the one with bigger distance will be brighter because it has a greater voltage potential between the wires. And once the experiment was done we saw that it was correct because of the greater potential between the wires and as shown in the image below will show the set up and light's brightness.

This the lab set up as explained above and the results came out to be that the brightness were determined by the amount of distance each LD light had between their wire leads and prove that the one with the greater distance was the brightest one.