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To what effective potential a proton bea...

To what effective potential a proton beam be subjected to give its protons a wavelength of `1xx10^(-10)m`.

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The correct Answer is:
`0.0826` volts
`1xx1^(-10)=6.6xx10^(-34)`
`=sqrt(2xx1.67xx10^(-27)xx1.6xx10^(-19)xxV)`
`therefore1=6.6xx1^(-24)=sqrt(5.344xx10^(-8))eV`
`therefore 1 =6.6 xx10^(-20)=sqrt(5.344xxV)`
`therefore sqrt(5.344xxV)=6.6xx10^(-20)`
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