## PHYS208 Fundamentals of Physics II

### Hint for Ch. 29, 56E

Use the formula for the dipole moment of a current loop, *NiA*;
the relationship for multiple turns *N* is that the radius of the loop will be
*L* = (2* pi* *r*) *N*.
Substitute this into *pi* *r*^{2} for the area and maximize.

"http://www.physics.udel.edu/~watson/phys208/exercises/hints/29-56E.html"

Last updated Oct. 23, 1997.

Copyright George Watson, Univ. of Delaware, 1997.