The photoelectric cut-off voltage in a certain experiment is 1.5 V. What is the maximum kinetic energy of photoelectrons emitted ?

Question

$\begin {array} {1 1} (a)\;2.4 \times 10^{-19}J & \quad (b)\;24 \times 10^{-19}J \\ (c)\;240 \times 10^{-19}J & \quad (d)\;2.4 \times 10^{-18}J \end {array}$