The variation of the stopping potential ( V₀ ) with the frequency of incident radiation(n) is as given below. [ n₀ - threshold frequency. h- Planck's constant e- electronic charge] then the slope of the graph AB with the frequency axis is:

Step-by-step solution

According to Einstein's photoelectric equation, the maximum kinetic energy of emitted photoelectrons is given by: K_ max = hn - where h is Planck's constant, n is the frequency of incident radiation, and is the work function of the metal. We know that K_ max = eV₀ , where e is the charge of an electron and V₀ is the stopping potential. Substituting this into the equation, we get: eV₀ = hn - V₀ = ( h e )n - e Comparing this equation with the standard equation of a straight line y = mx + c , we have: y = V₀ x = n Slo