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[" 6.A light beam of power "1.5mW" and "...

[" 6.A light beam of power "1.5mW" and "400nm" wavelength incident on a cathode.If quantum efficiency is "0.1%],[" then,find out obtained photo current and number of photoelectron per second."],[" 7.A metalic surface of work function hy is illuminatod hus matiotion "]

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