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In an experiment on photoelectric effect...

In an experiment on photoelectric effect, the slope of the cut-off voltage versus frequency of incident light is found to be `4.12xx10^(-15)V` s. Calculate the value of Planck's constant.

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Slope `=4.12xx10^(-15)Vs`
`(h)/( e)=4.12xx10^(-15)`
`h=4.12xx10^(-15)xx1.6xx10^(-19)=6.6xx10^(-34)Js`
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