1. Electricity and Magnetism
Physics 208
Dr. Tatiana Erukhimova
Lectures 10, 11

2. Gauss’s Law
The total flux of electric field out of any closed surface is equal to the charge contained inside the surface divided by

3. The flux of

4. Electric flux through a sphere
A positive point charge q=3.0 C is surrounded by a sphere with radius 0.2 m centered on the charge. Find the electric flux through the sphere due to this charge.

5. S Definition of a solid angle does not depend on radius The largest
Then

8. Proof of Gauss’s Law

9. Electric field of a single fixed charge
Chasing the tail:
Electric field of a single fixed charge

10. Conductors and insulators
Charges reside at the surface of the conductor + + + + + + + +
Conductor + +
E=0 + + + + +

11. Solid conducting sphere with charge QV r A r

12. Electric field of a ball of chargeQ
Electric field outside of a charged sphere is exactly the same as the electric field produced by a point charge, located at the center of the sphere, with charge equal to the total charge on the sphere.

13. Have a great day! Hw: All Chapters 4-5 problems and exercises
Reading: Chapter 5