JEE Main & Advanced
Physics
Photo Electric Effect, X- Rays & Matter Waves
Question Bank
Numerical Value Type Questions - Dual Nature of Radiation and Matter
question_answer
A metal plate of area \[1\times {{10}^{-4}}{{m}^{2}}\] is illuminated by a radiation of intensity \[16\text{ }mW/{{m}^{2}}.\] The work function of the metal is 5 eV. The energy of the incident photons is 10 eV and only 10% of it produces photo electrons. The number of emitted photo electrons per second is \[\left[ 1\,\,eV=1.6\times {{10}^{-19}}J \right]\]