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PhysicsModern PhysicsPhotoelectric effectEasy2 minPYQ_2020

PhysicsEasysingle choice

A metal surface of work function $1.07 e V$ is irradiated with light of wavelength $332 nm$ . The retarding potential required to stop the escape of photoelectrons is

Options:

Answer:

Solution:

Retarding potential,

$V_{s} = \frac{h c}{λ e} - \frac{ϕ_{0}}{e} = \frac{1240 \times 10^{- 9}}{330 \times 10^{- 9}} - 1.07$

$= 3.73 - 1.07 = 2.66 V$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Modern PhysicsSubtopic:Photoelectric effect

⏱ 2mℹ️ Source: PYQ_2020

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