Photoelectric effect - Einstein's photoelectric equation

2024 Re-NEET 1 question

1. If $\phi$ is the work function of photosensitive material in eV and light of wavelength of numerical value $\lambda=\dfrac{hc}{e}$ metre, is incident on it with energy above its threshold value at an instant then the maximum kinetic energy of the photoelectron ejected by it at that instant (Take h - Plank's constant, c - velocity of light in free space) is (in SI units):