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Given figure shows few data points in a ...

Given figure shows few data points in a photo electric effect experiment for a certain metal. The minimum energy for ejection of electron from its surface is ejection of electron from its surface is : (Plancks constant h = `6.62xx10^(-34) Js`)

A

2.27 eV

B

2.59 eV

C

1.93 eV

D

2.10 eV

Text Solution

Verified by Experts

The correct Answer is:
A
Graph of `V_(s)` and f given (B 5.5 , 0)
`hv = phi +eV_(s)`
at B `V_(s) = 0 , c = 5.5 `
`rArr h xx 5.5 xx 10^(14) = phi`
`phi = (6.62 xx10^(-34)xx5.5 xx10^(14))/(1.6 xx 10^(-19))eV = 2.27 eV `
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