The electrostatic potential energy between proton and electron separated by a distance `1Å` is

Options

A. 13.6 V
B. 27.2 eV
C. 14.4 eV
D. 1.44 eV

Answer

C

Explanation

`U=(1)/(4piepsilon_(0))(q_(1)q_(2))/(r)`
`therefore U=(9xx10^(9)xx(1.6xx10^(-19))(-1.6xx10^(-19)))/(10^(-10))J`
`=-9xx10^(9)xx1.6xx10^(-19)xx10^(10)eV`
`=-14.4eV`