A beam of light of wavelength 400 nm and power 1.55 mW is directed at the cathode of a…
Chemistry · JEE Main · NTA Exams — Atomic Structure
A beam of light of wavelength 400 nm and power 1.55 mW is directed at the cathode of a photoelectric cell (given \(h c=1240 \mathrm{eV}-n \mathrm{~m}_{4} \mathrm{e}=1.6 \times 10^{-19} \mathrm{c}\)). If only 10% of the incident photons effectively produce photoelectrons, find the current due to the electrons.
- 22 mA
- 70 mA
- 40 mA
- 50 mA
Answer
(A) 22 mA
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