  Multi-Weyl semimetals(WSMs) have an anisotropic non-linear dispersion along a
2-D plane and a linear dispersion in an orthogonal direction. They have
topological charge $\lq n $' and are created when two or multiple Weyl points
or nodes with nonzero net monopole charge are brought together onto a
high-symmetry point. We study the perturbation corrections up to second order
of such multi-WSMs in crossed electric($\mathcal{E}$) and magnetic (B) fields
in the low electric field approximation. As a result, the first order
correction lifts only n-fold degeneracy of the lowest Landau levels(LLs) while
the higher Landau levels are modified due to the second order perturbation. We
study the signatures of these corrections due to electric fields on the density
of states (DOS) subjected to a magnetic field.
