Physics

Problem

54. What is the radial component of the electric field associated with the potential

\mathrm{V}=\mathrm{ar}^{-2}

where a is a constant? A)

-2 a r^{-3}

-2 a r^{-1}

\mathrm{ar}^{-1}

2 a r^{-1}

2 a r^{-3}

\mathrm{ar}^{-1}