Photons with energy 5 eV are incident on a cathode C in a photoelectric cell. The maximum energy of emitted photoelectrons is 2 eV. When photons of…

Photons with energy $\displaystyle 5$ eV are incident on a cathode $\displaystyle C$ in a photoelectric cell. The maximum energy of emitted photoelectrons is $\displaystyle 2$ eV. When photons of energy $\displaystyle 6$ eV are incident on $\displaystyle C$, no photoelectrons will reach the anode $\displaystyle A$, if the stopping potential of $\displaystyle A$ relative to $\displaystyle C$ is