The work functions of Aluminium and Gold are 4.1 eV and 5.1 eV respectively. The ratio of the slope of the stopping potential versus frequency plot for Gold to that of Aluminium is [2023]

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Solution

Q.
The work functions of Aluminium and Gold are 4.1 eV and 5.1 eV respectively. The ratio of the slope of the stopping potential versus frequency plot for Gold to that of Aluminium is [2023]

1 1.24

2 2

3 1

4 1.5

Ans.
(3)

$e V_{s} = k_{\max}$

$V_{s} = {\frac{h}{e}} f + {\frac{- ϕ}{e}}$

$Slope is independent of nature of metal$

$slope {(V_{s})}^{Gold} = slope {(V_{s})}^{Aluminium}$

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