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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsPhotoelectric effectEasy2 minPYQ_2020

PhysicsEasysingle choice

Two incident radiations having energies two times and ten times of the work function of a metal surface, produce photoelectric effect. The ratio of maximum velocities of emitted photo electrons respectively is

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Answer:

Solution:

$\frac{1}{2} m v_{1}^{2} = 2 ϕ_{0} - ϕ_{0}$ $\frac{1}{2} m v_{2}^{2} = 10 ϕ_{0} - ϕ_{0}$ $\frac{v _{1}^{2}}{v _{2}^{2}} = \frac{1}{9}$ $∴ \frac{v _{1}}{v _{2}} = \frac{1}{3}$

Stream:MHT_CETSubject:PhysicsTopic:Modern PhysicsSubtopic:Photoelectric effect

⏱ 2mℹ️ Source: PYQ_2020

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