When light of intensity 1W//m^2 and wavelength 5xx10^(-7)m is incident on a surface, it is completely absorbed by the surface. If 100 photons emit one electron and area of the surface is 1cm^2 ,then the photoelectric current will be

When light of intensity 1W//m^2 and wavelength 5xx10^(-7)m is incident

1.	When light of intensity 1W//m^2 and wavelength 5xx10^(-7)m is incident on a surface, it is completely absorbed by the surface. If 100 photons emit one electron and area of the surface is 1cm^2 ,then the photoelectric current will be
Answer» 2MA `0.4 MUA` 4.0 mA `4 muA` Solution :0.4 `mu` A (3) 4.0 mA (4) `mu` A Number of photon / second `N=(IA)/((hc)/(LAMBDA))` Number of photo electron emitted/second `=N/100` Photo electric CURRENT `=N/100xxe`