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Physics - Fluid Question with Solution | TestHub

PhysicsFluidSurface TensionMedium2 minPYQ_2010

PhysicsMediumsingle choice

The maximum velocity of electrons emitted from. a metal surface is $v$ , when frequency of light falling on it is $f$ . The maximum velocity when frequency becomes $4 f$ is

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Solution:

According to Einstein's photoelectric equation, $E = W_{0} + \frac{1}{2} m v_{m a x}^{2} \Rightarrow v_{m a x} = \frac{2 ( h f - W _{0} )}{m}$ If frequency becomes $4 f$ then $v^{'} = \frac{2 ( h \times 4 f - W _{0} )}{m} = 2 \frac{2 ( h f - \frac{W _{0}}{4} )}{m} \Rightarrow v^{'} > 2 v$

Stream:VITEEESubject:PhysicsTopic:FluidSubtopic:Surface Tension

⏱ 2mℹ️ Source: PYQ_2010

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