# Relativistic angular moment of electron in electric field

## Homework Statement

Consider an electron with spin ##\vec{S}## and magnetic moment ##\vec{\mu}=-\frac{e}{m}\vec{S}##. It is moving with the velocity ##\vec{v}(t)## relative to the inertial frame of reference ##I## through the electric field ##\vec{E}##. Calculate the angular momentum the electron experiences in its instantaneous rest frame ##I'##!
Compute the angular momentum with respect to ##I## under the condition ##v\ll 1##!

## Homework Equations

Lorentz Force: ##F^i=q F^{ik}u_k=q\gamma(\vec{E}\cdot\vec{v}, \vec{E}+\vec{v}\times\vec{B})##

Where ##F_{ik}:=\partial_i A_k-\partial_k A_i## is the Faraday-Tensor

and ##F^{ik}=\eta^{im}\eta^{kn}F_{mn}##

The angular momentum tensor is given by ##l^{ik}=x^i p^k-x^kp^i##

## The Attempt at a Solution

I really don't know how to solve this problem, sorry!