  Here we report the comparison of the upper critical fields of different
superconductors being calculated by two different theories i.e., Werthamer
Helfand Hohenburg (WHH) and Ginzberg Landau (GL). All the samples are
synthesized through previously known solid state reaction route. Phase purity
is determined from the Rietveld refinement of powder X-Ray diffraction (XRD)
data. High field (up to 14Tesla) magneto transport \r{ho}(T)H of different
superconductors is studied to estimate their upper critical field (Hc2). The
present inter comparison covers from Cuprates (YBa2Cu3O7) - Borides (MgB2) - Fe
pnictides (NdFeAsO0.8F0.2) and chalcogenides (FeSe0.5Te0.5) to robust Nb2PdS5.
The upper critical fields [Hc2(T)] at zero temperature are calculated by
extrapolating the data using GL and WHH equations.
