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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsPhotoelectric effectEasy2 minPYQ_2020

PhysicsEasysingle choice

A photo-cell is being operated in saturation mode. Electromagnetic radiations of wavelength $λ m$ fall upon the photo-cell. The corresponding spectral sensitivity of photocell is $J A W^{- 1}$ . The number of photo-electrons produced by each incident photon, is

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Answer:

Solution:

Power of source $P = \frac{n \cdot h c}{λ}$ ...(i)
$n \to$ no. of incident photons per second
Photo current $I = n^{'} e$ ...(ii)
$n^{'} \to$ no. of electrons reaching anode per second
$\Rightarrow \frac{n'}{n} = \frac{I}{e} \times \frac{h c}{P λ} = \frac{h c}{e \cdot λ} [\frac{I}{P}] = \frac{h c J}{e λ}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Modern PhysicsSubtopic:Photoelectric effect

⏱ 2mℹ️ Source: PYQ_2020

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