L = 2*pi*r,

A = L/4*pi,

A = L^2/16

Okay i know the lengths are the same for the circular coil and the square coil. Oh and the form has changed.

So A1/A2 = (L^2/4*pi) / (L^2/16) = 16/4*pi

and for the current i could use I2 = V2/R

and i'm not sure but i think R = V1/I1 ?

I've put some formulas together with some help, can someone work the rest of this out, i have just about all the formulas i believe.