Question

The electric potential due to a dipolar molecule of electric dipole moment 6 × 10^-30 A∙m² at a point along the axis of the dipole is 1 V. Find the distance of the point from the centre of the dipole.

Answer 1

Data : p = 6 × 10^-30 A∙m² , V = 1 V,

θ = 0° (axial point), 1/4πε₀ = 9 × 10⁹ N∙m² /C² Electric potential,

V = \(\cfrac1{4πε_0}\)\(\cfrac{p\,cos\,\theta}{r^2}\)