Friday, March 27, 2015

Lab 10: Dipole Moments and Electric Flux

We started the day talking about the path an electron will take if it undergoes between a positive plate and a negative plate. The result was a projectile motion trajectory. In addition, the acceleration is on the direction of the electric field.

We also looked into electric dipole in an electric field, which is defined as p = 2aq. In the dipole moment the vector is directed from the negative charge towards the positive charge. We also derived torque as the result from the cross product between the dipole moment and the electric field. Also, we found that the work is the negative dot product between the dipole moment and the electric field, so the electric potential energy should be just the dot product.

This picture describes the removal of makeup at the physics level.

We also worked in a Vpython program, which consisted on displaying the electric field due to two charges.
 Here is the code.

Here is the output of the electric field.

Then we started using the caltech electric field applet in order to have a visualization of the electric field due to various point charges.
One electron and it's electric field.

This picture shows the electric field of a positive charge with a negative charge.

Here professor Mason put a point charge for us to determine the direction it will take.

Professor Mason introduced to us an example of flux model. He explained with a square wire that if it is parallel to the wood surface then the flux will be max since it covers the maximum amount of electric field vectors; likewise, if the wire is perpendicular to the surface then the flux is zero.

This photo shows that the flux is maximized.

We determined the flux to be the dot product between the area and the electric field.

We did an example that consisted on finding the flux of a box when the electric field vectors are going to the positive x direction. 

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