Threshold wavelength of certain metal , which is hung by a string made of insulating material ,is ${\mathrm{\lambda }}_0$. A radiation of wavelength $\mathrm{\lambda }<{\mathrm{\lambda }}_0$ is incident on the plate. Then, choose the correct statement from the following.

For photoemission, $\mathrm{\lambda }<{\mathrm{\lambda }}_0$. Due to the ejection of photoelectrons , the target metal gradually acquires positive charge and the target metal exerts electrostatic force of attraction on the ejected electrons .

After some time if potential acquired bythe target metal is V , then ejection of photoelectrons will stop when 

the relation eV = $\frac{hc}{\lambda }-\frac{hc}{{\lambda }_0}$ is satisfied .