Announcements. Homework for tomorrow… (Ch . 28 CQ1, Probs. 7 & 37) 26.50: a) 3.6 x 10 3 N/C b) Δ y = 9.6 x 10 3 m 27.26: E 1 = 0 N/C, E 2 = 0 N/ C, E 3 = 8.0 x 10 -9 N /C 27.27: a) (2.5 x 10 4 N/ C) jhat b) 0 N/ C c) -( 2.5 x 10 4 N/C) jhat Office hours…
(Ch. 28 CQ1, Probs. 7 & 37)
26.50: a) 3.6 x 103 N/C b) Δy = 9.6 x 103 m
27.26: E1 = 0 N/C, E2= 0 N/C, E3= 8.0 x 10-9 N/C
27.27: a) (2.5 x 104N/C) jhat b) 0 N/C c) -(2.5 x 104 N/C) jhat
MW 12:30-1:30 pm
TR 9-10 am
F 10-11 am
M 8-1 pm, 3-6 pm, W 8-1 pm, 2-6 pm
TR 8-6 pm, F 8-2 pm
The Electric Potential
(Potential Energy of Point Charges)
Work done by a constant, variable force…
Potential energy defined…
Potential energy of a charge q in a uniform E-field…
Two negative charges are equal.
Which has more electric potential energy?
A positive point charge is moved from i to f in the non-uniform E-field shown. During this process…
The electric potential energy between two point charges is…
A positive and a negative charge are released from rest in vacuum. They move toward each other. As they do:
An interaction between two elementary particles causes an electron and a positron (a positive electron) to be shot out back to back with equal speeds.
What minimum speed must each have when they are 100 fm apart in order to escape each other?
What is the electric potential energy of 3 pt charges?