Day 11: Gauss' Law

At the beginning of the class, we chose three circles to find the charge enclosed by the arbitrary surface and  the lines of flux in and out of the surface

In this picture, q is proportional to flux, and we figured out that the unit of constant k is c^2/N*m^2.

We also found a relationship between q/e_{o and E*A.}

The black net like device is called Faraday cage. We need to predict what would happen to the foils when the cylinder is charged.

What our predicted was right, which only the outer foils will move away from the cylinder. 

In this picture, it shows that the Q is on the surface when the cylinder is charged.

This picture shows a relationship betweeen E and  σ.

In this picture, it shows what changes in perimeter, area, and volume when the radius is double.

This picture shows the Gauss' law

In this picture, we plugged in 4πr^2 as area and found the relationship between E, q, and r.

This picture shows that we used the Gauss' law to find spherically symmetric charge distributions and the electric field.

In this activity, the professor put a ball inside a micro wave and it fires, when professor put a CD inside, it broke, a match with fire inside and nothing happened. And finally a bubble inside, the bubble fires

This picture shows a problem on Geometry of Cylinders. We found the volume in terms of p, r, and L, fraction of the charge with a radius of r/2 and total charge Q, and the surface area of the cylinder.

In these two pictures we also found the electric field about the circle.

Conclusion

In today's class, we analyzed Gauss' Law and utilize it for both electrical and gravitational fields and how they work in real life. We also analyzed the relationship between electric field give the charges of Gauss' Law with different conducting materials. We also looked at what happened when different things were put in microwave and we can tell and preferred paths of electrical discharges.