A dipole consisting of an electron and a proton separated by a distance of `4 xx 10^(-10)m` is situated in an electric field of intensity `3 xx 10^(5) NC^(-1)` at an angle of `30^(@)` with the field. Calculate dipole and torque acting on it. `(e=1.6 xx 10^(-19)C)`.

Explanation

Data supplied,
Charge of an electron `=|q_(1)|=e=1.6 xx 10^(-19)C`
Charge on proton `=|q_(2)| =e =1.6 xx 10^(-19)C`
Dipole length `=2a=4 xx 10^(-10)m`
Dipole moment `p=2a xx " any of the charge "=4 xx 10^(-10) xx 1.6 xx 10^(-19)=6.4 xx 10^(-29) C.m.`
Electric field intensity `E=3 xx 10^(5) NC^(-1), theta=30^(@), sin theta=sin 30^(@)=1/2`
Torque,` tau =p E sin theta=6.4 xx 10^(-29) xx 3 xx 10^(5) xx 1/2=9.6 xx 10^(-23)Nm`