Physics

Problem

At a point 0.20 m from an isolated point charge, the magnitude of the electric field is 900 N C

^{-1}

. What is the field magnitude at a point 0.60 m from the same charge on the same radial line? a)

300\ \text{N C}^{-1}

60\ \text{N C}^{-1}

100\ \text{N C}^{-1}

450\ \text{N C}^{-1}