82208-Coulomb

# 82208-Coulomb - Office Hours: Monday: 1:30 to 2:30 PM...

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Office Hours: Monday: 1:30 to 2:30 PM Thursday: 1:00 to 2:00 PM in Riddick 441 or by appointment! My usual office: 155 Partner III on Centennial Campus Homework: Short problem sets due pretty much every other day. Pay attention to the due dates listed on WebAssign.

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Objectives for the Day: 08/22/08 1) Review Coulomb’s Law. 2) Explain the principle of superposition. 1) Calculate electrostatic forces using Coulomb’s law and the principle of superposition. 4) Introduce continuous charge distributions.
Coulomb’s Experiments Knob Fixed charged ball Rotatable charged ball Coulomb tuned the knob by hand to keep the distance between charges spheres constant. The angle that he had to turn the knob is a measure of the electrostatic force between the balls

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Coulomb’s Law: Established by Experiments 12 2 2 1 12 ˆ r r q kq F = q 1 r 12 ˆ r q 2 Force that charge 1 exerts on charge 2: k = 9.0 x 10 9 N m 2 /C 2 (All charges must be stationary)
12 2 2 1 12 ˆ r r q kq F = Coulomb’s Law

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## This note was uploaded on 09/28/2008 for the course PY 208N taught by Professor Dougherty during the Spring '08 term at N.C. State.

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82208-Coulomb - Office Hours: Monday: 1:30 to 2:30 PM...

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