If you have a rectangular square potential barrier of some height, say \lambda/L, and thickness L, what is the transmission coefficient and what is its value in the limit that L goes to 0?
Thus you have the height of the barrier going to infinity, while the width goes to zero... Assuming...
So, the parametric representation of a point on the semi-circle would be (0, bcos(t), bsin(t)) where b is the radius of the semi-circle.
The vector R is just [d, 0, 0] where d is the distance on the axis of the point
and then the e is the unit vector from R-r
But what's dr? And where does the...
Homework Statement
Determine the magnetic field strength and direction at a point 'z' on the axis of the centre of a semi-circular current loop of radius R.Homework Equations
Biot Savart Formula
d\vec{B}=\frac{\mu_{0}Id\vec{r}\times\hat{e}}{4\pi|\vec{R}-\vec{r}|^{2}}
e being the unit vector...