CGPET 2018 Solved Paper

According to Einstein's photoelectric equation,
Kmax=hv−W0
where, Kmax is maximum kinetic energy of ejected electron, v is the frequency of incident photon, h is Planck's constant and W0 is the work function.
As,W0=hv0
Hence, Kmax=hv−hv0=h(v−v0)