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----- Original Message -----most texts don't
From: "John Denker" <jsd@AV8N.COM>
That dr = -ds is always my stumbling block because
reallyrelative to yours.
spell it out. HR&K just jump from E dot ds to Edr.
Probably their limits of integration are swapped
at the picture
No, actually my confusion was dumber than that. I looked
showing ds pointed towards the point charge and justmentally replaced it
with dr -- not thinking that pointed that way would makeit -dr.