  The current in response to a bias in certain two-dimensional electron gas
(2DEG), can have a nonzero transverse component under a finite magnetic field
applied in the plane where electrons are confined. Typically, this is
accompanied by dependencies of both the longitudinal and the transverse
components of current on the angle $\phi$ between the bias direction and the
magnetic field. This happens in a variety of systems, for example in
topological insulators where spin-orbit coupling (SOC) is the root cause for
the effect. In 2DEG with SOC such as oxide interfaces, this effect has been
experimentally witnessed. Further, a fourfold oscillation in longitudinal
resistance as a function of $\phi$ has also been observed. Motivated by these,
we perform scattering theory calculations on a 2DEG with SOC in presence of an
in-plane magnetic field connected to two dimensional leads on either sides to
obtain longitudinal and transverse conductances. We find that the longitudinal
conductance is $\pi$-periodic and the transverse conductance is $2\pi$-periodic
in $\phi$. The magnitude of oscillation in transverse conductance with $\phi$
is enhanced in certain patches in $(\alpha,b)$-plane where $\alpha$ is the
strength of SOC and $b$ is Zeeman energy due to magnetic field. The oscillation
in transverse conductance with $\phi$ can be highly multi-fold for large values
of $\alpha$ and $b$. The highly multi-fold oscillations of transverse
conductance are due to Fabry-P\'erot type interference between the modes in the
central region as backed by its length dependent features.
