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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsPhotoelectric effectEasy2 minPYQ_2020

PhysicsEasysingle choice

When radiation is incident on a photoelectron emitter, the stopping potential is found to be $9 V$ . If e/m for the electron is $1.8 \times 10^{11} C k g^{- 1}$ , the maximum velocity of ejected electrons is

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Answer:

Solution:

$e V = \frac{1}{2} m v^{2}$

or $v = \sqrt{\frac{2 e V}{m}} = \sqrt{2 \times (1.8 \times 10^{11}) \times 9} = 1.8 \times 10^{6} m s^{- 1}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Modern PhysicsSubtopic:Photoelectric effect

⏱ 2mℹ️ Source: PYQ_2020

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