Question

The dipole moment, of a deuteron and an electron, separated by a distance of 1.6 femtometre is

(1) 4.096 x 10^-34 cm

(2) 5.12 x 10^-34 cm

(3) 8.192 x 10^-34 cm

(4) 2.56 x 10^-34 cm

Answer 1

(4) 2.56 x 10^-34 cm

P = q (2a) 

Here q = e = 1.6 x 10^-19C 

2a = 1.6 femtometre

= 1.6 x 10^-15 m

∴ P = 1.6 x 10^-19 x 1.6 x 10^-15 Cm

= 2.56 x 10^-34 Cm