  The Planar Hall effect (PHE) in topological materials has been a subject of
great interest in recent years. Generally, it is understood to originate from
the chiral-anomaly (CA) induced charge pumping between doubly degenerate Weyl
nodes. However, the occurrence of PHE in the materials with positive and
anisotropic orbital magnetoresistance has raised questions about CA being the
sole origin of this effect. Here, we report the PHE, magnetoresistance, and
thermal transport properties (Seebeck and Nernst coefficients) on the Ag
intercalated PdTe$_2$. We observe positive longitudinal magnetoresistance, the
linear field dependence of the amplitude of PHE, and a prolate pattern in the
parametric plots. The planar Hall resistivity and anisotropic magnetoresitance
fits well with theoretical study of CA being the origin of PHE. So, our
observations are consistent with Weyl physics dominating the PHE in PdTe$_2$,
Cu$_{0.05}$PdTe$_2$, and Ag$_{0.05}$PdTe$_2$. We further support our data with
a theoretical model that reproduces the qualitative experimental features. In
addition, we have calculated the Seebeck ($\it{S}$) and Nernst ($\nu$)
coefficients for PdTe$_2$ and Cu and Ag intercalated compounds. The estimated
values of Fermi energy for the Cu and Ag intercalated compounds are
respectively two times and three times larger than that of PdTe$_2$.
