Physics

Problem

A dipole of moment

2.0\times10^{-9}\,\text{C\,m}

is placed in vacuum. Calculate the electric potential at a point

20\,\text{cm}

away on its axial line. (Take

\dfrac{1}{4\pi\epsilon_0}=9\times10^{9}\,\text{N\,m}^2\text{C}^{-2}

.) a)

900\,\text{V}

-450\,\text{V}

450\,\text{V}

90\,\text{V}