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Dual Nature of Radiation question

2020 · 7 Jan · Shift 1 · Q44
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Dual Nature of Radiation question

2020 · 7 Jan · Shift 1 · Q44

JEE MainPhysicsDual Nature of RadiationNumerical+4 / −1
A beam of electromagnetic radiation of intensity 6.4 × 10–5 W/cm2 is comprised of wavelength, λ\lambdaλ= 310 nm. It falls normally on a metal (work function ϕ\phiϕ = 2eV) of surface area of 1 cm2. If one in 103 photons ejects an elctron, total number of electrons ejected in 1 s is 10x. (hc = 1240 eVnm, 1eV = 1.6 × 10–19 J), then x is ‾\underline{\hspace{2cm}}​.
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