A dipole of moment is placed in vacuum

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Electric Force Field and Potential · Electric Force Field and Potential

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}

(b)

-450\,\text{V}

(c)

450\,\text{V}

(d)

90\,\text{V}