An electron and a proton held \( 1\,\mathring{\mathrm{A}} \) apart form an electric dipole. The electric dipole moment of the dipole is :
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → \( 1.6\times10^{-29}\,\mathrm{C\,m} \)
The electric dipole moment is the magnitude of one charge times the separation, \( p = q\,d \). Here each charge has magnitude \( e \).
\( q = 1.6\times10^{-19}\,\mathrm{C} \)
\( d = 1\,\mathring{\mathrm{A}} = 10^{-10}\,\mathrm{m} \)
\( \displaystyle p = 1.6\times10^{-19}\times10^{-10} = 1.6\times10^{-29}\,\mathrm{C\,m} \)