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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsPhotoelectric effectEasy2 minPYQ_2020

PhysicsEasysingle choice

Ultraviolet radiation of 6.2 eV falls on an aluminium surface (work function 4.2 eV). The kinetic energy of the faster electron emitted is approximately

Options:

Answer:

Solution:

KE of emitted electron is

$E_{K} = h ν - W$

$= 6.2 e V - 4.2 e V = 2.0 e V$

$= 2 \times 1.6 \times 10^{- 19} J$

$= 3.2 \times 10^{- 19} J$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Modern PhysicsSubtopic:Photoelectric effect

⏱ 2mℹ️ Source: PYQ_2020

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