Vphyton Project 2

At this point, I choose the charge particles as the two we used in class to calculate the potential on a circle around the system, and find that on the circle the potential varies at different point.

I set up my own particles and calculate the potential on the circle around it, and i found that the potential is all same at every point on the circle

At this point, I add another charge particles as well as the two we used in class to calculate the potential on a circle around the system, and find that on the circle the potential also varies at different point.

Summary: For a charge system consist of a single particle, potential of every point on the circle around the particle is all same, and the circle is its equal potential line.
For system consists of more than 1 charge particles, potential of every point on the circle around the particle are different.

python project, vector project

This is just a practice example. I didn't make it very nice cause I just want to try if everything works.

This practice the vector. I am trying to make them point to each other.

I let them completely point to each other. I know it is ugly.

By adding the print command to show the position of each balls, it seems like there is no differences.

3/20/2015 first day of electric

By giving some sets of data, we draw a graph that showed some relationship between time and their position, and electric force. We will use those relationships to solve the electric constant later. Then we found that electric constant is approach to 8.85 810^-12.

At this moment, we draw the gravity force vs distance graph, and we observe and predict that the electric force may have the similar relationship between distance and column. The only thing we need to solve is to figure the constant out that plays the same role as gravity constant. The constant we named is column constant, which is 1/(4PI*eletric constant) = 8.99 *10^9

By giving electric charge and distance separated, we can figure out the electric force between them. Also, if they are both negative or both positive charged, the force applied to each of them will have the same magnitude but opposite direction making them repelling each other. If they share opposite charge, the force still gonna be same magnitude and opposite direction, but making them attract each other.

When we start this equipment, the top part got charged, which make the paper slip have the same charge as the equipment. Thus, they repel each other.

When we put the steel shelf on the top and let it charged, it starts to spin. The reason it starts to spin is because all charged particles finally move to the sharp end of each branch and repel each other, which make it spin.

This is the prediction we make for the picture above, and the result is same as our prediction, which is spinning clockwise.

Since there is mass of charged particles, and we wonder if we need to consider the influence due to gravity force as well as an electric force even though the mass can be very small. By calculating the  ratio of electric force and gravity force, we find that the ratio is very huge. We can see that electric force is much much larger than gravity force, therefore, we can ignore the influences due to gravity force during calculation.