Question

Calculate the Electric dipole moment of an electron and a proton 4.30 nm apart ?

Answer 1

Here , 
 Magnitude of charge of electron and proton  q = 1.6  x 10⁻¹⁹ C 

Distance between electron and proton 2a =  4 . 3 nm = 4.3 x 10 ⁻⁹ m 

Electric dipole moment =  q x 2a 
                                     =   1.6 x 10 ⁻¹⁹ X 4.3 x 10⁻⁹
                                     = 6.88 x 10⁻²⁸ C m 
__________________________________________________________