A beam of light of wavelength 400nm and power 1.55 mW is directed at
Channel: Doubtnut
Date: 16/08/2020

A beam of light of wavelength 400nm and power 1.55 mW is directed at the cathode of a photoelectric cell. If only 10% of the incident photons effectively produce photoelectrons, then find current due to these electrons. (given `hc=1240 eV-nm, e=1.6xx10^(-19)C`)