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PhysicsModern PhysicsPhotoelectric effectMedium2 minPYQ_2020

PhysicsMediumstatement

Given figure shows few data points in a photo-electric effect experiment for a certain metal. The minimum energy for ejection of electrons from its surface is: (Planck's constant $h = 6.62 \times 10^{- 34} J.s$ )

Options:

Answer:

Solution:

Threshold Energy $= hv$

$= 6 .62 \times 10^{- 34} \times 5 .5 \times 10^{14} J$

Work friction $= \frac{6 .62 \times 5 .5 \times 10^{- 20}}{1 .6 \times 10^{- 19}} eV$

$= 2 .27 eV$

Stream:JEESubject:PhysicsTopic:Modern PhysicsSubtopic:Photoelectric effect

⏱ 2mℹ️ Source: PYQ_2020

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