Chronology | Current Month | Current Thread | Current Date |
[Year List] [Month List (current year)] | [Date Index] [Thread Index] | [Thread Prev] [Thread Next] | [Date Prev] [Date Next] |
My guess is your algebraic expression for 'r' is probably Sqrt(x^2 + P^2),
but that doesn't give you the correct r for negative x values. You'll
need
to use something like r = sqrt((L-x)^2+p^2).
See if that's the problem. If not, give more details.
Rick
***************************
Richard W. Tarara
Professor of Physics
Saint Mary's College
Notre Dame, IN
rtarara@saintmarys.edu
******************************
Free Physics Software
PC & Mac
www.saintmarys.edu/~rtarara/software.html
*******************************
----- Original Message -----
From: <pschoch@nac.net>
To: <phys-l@carnot.physics.buffalo.edu>
Sent: Tuesday, February 27, 2007 11:49 AM
Subject: [Phys-l] (no subject)
Greetings,
I am trying to solve a problem asked of me by the class, and am
having a bit of trouble...
I solved the E field problem of a finite line of charge on the x axis
from -L to 0, at a point (0,P).
One young man took an example from the textbook, tried to combine it
with
my example, and got a solution that makes no sense and asked if I could
do
it.
After trying, I also get something that doesn't seem right, and I need a
bit of help doing this with only freshman techniques. The problem is:
You have a line of charge from (-L,0) to (L,0), and a point at
(-L,P). Evaluate the E field at the point (L,P).
When I try to do this by Freshman physics methods and evaluate the
line integral to get the x and y components from the line of charge I
get
the x component to cancel out (because of the integration from -L to
+L).
Now, this can't be correct, but I don't see my error.
Any help would be appreciated.
P. Schoch
_______________________________________________
Forum for Physics Educators
Phys-l@carnot.physics.buffalo.edu
https://carnot.physics.buffalo.edu/mailman/listinfo/phys-l
_______________________________________________
Forum for Physics Educators
Phys-l@carnot.physics.buffalo.edu
https://carnot.physics.buffalo.edu/mailman/listinfo/phys-l