[RadioAstronomer]

Here ya go - "infinite wire" :-)

http://www.pa.msu.edu/~duxbury/courses/phy294H/lectures/lecture22/lecture22.html

[exDemMom]

Here ya go - "infinite wire" :-)

Now I am reminded why I never considered majoring in physics. The calculus! All of those letters that you have to write on a crib sheet so you can remember what they mean when you take the exam! Arggh! The most important physical concept I ever learned was "run to red."

(That describes the behavior of biological molecules in an electric field, and has the advantage of saving me the trouble of figuring out which is the positive wire and which is the negative every time I want to electrophoresis something.)

(All the electrophoresis boxes have color coded contacts anyway, so you always plug in the wires correctly. Gee, biologists are dumb!)

Actually, there are a lot of other physical concepts that come into my work. We life scientists don't tend to think of them as physics, though. And most of us don't do calculus.