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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsPhotoelectric effectEasy2 minPYQ_2022

PhysicsEasysingle choice

The light rays having photons of energy $4.2 eV$ are falling on a metal surface having a work function of $2.2 eV$ . The stopping potential of the surface is:NEET 2022 (Phase 2)

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Answer:

Solution:

By Einstein photoelectric equation, we have; $K.E. e V_{0} e V_{0} = h v - ϕ = 4.2 eV - 2.2 eV = 2 eV = 2 volt$

Stream:NEETSubject:PhysicsTopic:Modern PhysicsSubtopic:Photoelectric effect

⏱ 2mℹ️ Source: PYQ_2022

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