Homework Statement
Consider the Hamiltonian:
$$\hat{H}=C*(\vec{B} \cdot \vec{S})$$
where $C$ is a constant and the magnetic field is given by
$$\vec{B} = (0,B,0) $$
and the spin is
$$\vec{S} = (\hat{S}_{x},\hat{S}_{y},\hat{S}_{z}),$$
with$$\hat{S}_{x}...
Sorry i should have qualified, I know what the symbols represent, and i realize that I_d is given, i also assume I is 0. However what i don't understand is why?
Homework Statement
A cylindrical parallel plate capacitor of radius R is discharged by an external current I. The
total electric field flux inside the capacitor changes at a rate dΦe/dt = I/ ε0. What is the
strength of the resulting magnetic field B(r, I) inside the capacitor at a radial...