Class 10, Friday, October 18, 2013
Electric Potential Energy of a system of a system of fixed charges
Earlier, we worked out the electric potential generated by a system of three fixed pointcharges at various points in space. In our example, the charges w
Trig Cheat Sheet
Definition of the Trig Functions
Right triangle definition
For this definition we assume that
0 < q < or 0 < q < 90 .
Unit circle definition
For this definition q is any angle.
( x, y )
Class 2, Monday, September 30, 2013
Reading: 20.1, 20.2
We will first not be concerned with charges in motion and focus instead on what happens
between objects whose charges are stationary. At best, we will allow electrical charges to
Class 5, Friday, October 4, 2013
The Electric Dipole Field (continued from last class)
6) We are now done with probing the x-axis, except for one very useful thought: What
happens very far from the charges, for x > a ?
In order to find the answer
Class 5, Monday, October 7, 2013
Electric Dipole in an Electric Field
We probed in great detail the electric field of a dipole, but what would happen if we
placed an electric dipole into an external electric field?
Before we tackle this question, recall t
Class 7, Friday, October 11, 2013
Last class we found the following two interesting aspects:
1) The electric flux through a cubical surface placed in a uniform electric field is zero.
Recall that there was no charge inside the surface.
2) The electric flu
Syllabus for Physics 6C, Fall Quarter, 2013
Instructor: Adriane Steinacker
e-mail: [email protected]
Office: ISB157 / Phone: 9 2790
Office Hours: Please note that in order to serve a larger number of students than is
possible by holdi
Class 3, Wednesday, October 2, 2013
Reading: 20.3, 21.1
We now return to the simple example we began with when introducing the Coulomb
force: two positive charges, q1 and q2, separated by a known distance, r. We know that
charge q2 experiences an electros
Class 1, Friday, September 27, 2013
Any sufficiently advanced technology is indistinguishable from magicA.C. Clarke
Imagine, I would have given this lecture in 1803, at the time when Thomas Young
performed his famous Double Slit Experiment that demonstrat
Class 9, Wednesday, October 16, 2013
Our starting point are the potential energy difference and potential difference formulas
for the electric field generated by a point charge from last class:
U 2 ! U1 = kqq0 $ ! ' =-WFE
# r2 r1 &
" 1 1 % (U -WF
Class 8, Monday, October 14, 2013
One more Example using Gausss Law: A positive point-charge, +q, is placed at the
center of an electrically neutral conducting hollow sphere. The inner and outer radii of
the spherical shell are R01 and R02, respectively.
Class 12, Wednesday, October 23, 2013
Solving Problems using Energy Conservation
We can now begin considering changes in the kinetic energy of components of a system.
One of the most fascinating experiments in history was conceived in 1909 by the New
Class 6, Wednesday, October 9, 2013
To understand what flux means, we will do a thought experiment. Imagine a cylindrical
and horizontal flow of water streaming out of a pipe. You want to pass this through a
hoop with a radius smaller than t
Class 11, Monday, October 21, 2013
Is it possible to do better with a spherical capacitor than the single spherical surface we
looked at last class?
The Spherical Capacitor
What if we introduced a second conducting sphere, a distance d=1mm away from the f