A beam of light of wavelength 400 nm and power 1.55 mW is directed at the cathode of a photoelectric cell. If only 10% of the incident photons effectively produce photoelectron, then find current due to these electrons.
[given, hc = 1240 eV - nm, e = 1.6 × 10-19 C)
1
5 μA
2
40 μA
3
50 μA
4
114 μA
5
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