A beam of light falls on a metal surface such that photo-electrons are generated. If power of the light source starts to decrease linearly with time…

A beam of light falls on a metal surface such that photo-electrons are generated. If power of the light source starts to decrease linearly with time $\displaystyle t$, then variation of the photocurrent $\displaystyle I$ and magnitude of the stopping potential $\displaystyle |V|$ with time is best represented by :