| -----Original Message-----
| From: Forum for Physics Educators [mailto:PHYS-L@lists.nau.edu] On Behalf
| Of John Denker
| Sent: Thursday, February 26, 2004 12:03 PM
| To: PHYS-L@lists.nau.edu
| Subject: Re: Potential of a point charge
|
| Quoting Rick Tarara <rtarara@SAINTMARYS.EDU>:
[***]
. . .
| That's because you are integrating *from* infinity back toward
| some particular r. Equivalently you could set dr = +ds provided
| you write the integral as
|
| / to r
| |
| |
| / from infinity
| . . .
[***]
John, in order to set dr = + ds, you should integrate from r to infinity,
correct?
In which case I think you have a typo in the above and should have the
limits reversed in the integral.