Recent content by Jan05

My idea was to use the continuity of parallel components of the magnetic field and the spherical coordinate system. Because the magnetic field in a superconducting material is 0 and the current is completely confined to the surface, there only is a ##\mathbf{B}_{above}## component. The equation...

I thought it needed to invlove ##x## because the area changes in function of ##x## so you start with the area perpendicular to the ##x##-direction ##A = y_0 z_0## and then integrate in the same direction as the current from ##x_0 - x_i## to ##x_0##.

It isn't true that I didn't bother answering the two other questions. I gave my thoughts on the area perpendicular to the current after I worked this out on paper. For your third question: if elements ##dR## are in series we can add them together. This is what we are doing by evaluating the...

Thank you for your answer. I think I see where i made a mistake. The direction of the current is along the ##x##-axis. Because the height of the prism change in function of ##x## I thought of calculating the contribution by an integral and then integrate with respect to ##x##. I think that the...

I'm working on the following differential resistance problem and wondering wether I'm approaching the question the right way. The problem is to find an expression for the resistance in the ##x##-direction of a wire with electrical resistivity ## ~ \rho ~ ## in terms of ##~ z_0 ~##, ##y_0 ~ ##...