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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsPhotoelectric effectMedium2 minQB

PhysicsMediumsingle choice

Ultraviolet radiation of 6.2eV falls on an aluminium surface(work function 4.2eV). the kinetic energy in joule of the fastest electron emitted is approximately:

Options:

Answer:

Solution:

$K_{m a x} = 6.2 - 4.2 = 2.0 eV K_{m a x} = 2 (1.602 \times 1 0^{- 19}) = 3.20 \times 1 0^{- 19} J$

Choose the nearest value, $3 \times 1 0^{- 19} J$

Stream:JEESubject:PhysicsTopic:Modern PhysicsSubtopic:Photoelectric effect

⏱ 2mℹ️ Source: QB

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