Physics

Problem

Two parallel equipotential surfaces are

3.0\,\text{cm}

apart. The potential on the surface closer to a reference point is

180\,\text{V}

, and on the other surface it is

120\,\text{V}

. What is the magnitude of the average electric field between the two surfaces? a)

3.0 \times 10^{3}\,\text{V\,m}^{-1}

6.0 \times 10^{3}\,\text{V\,m}^{-1}

2.0 \times 10^{3}\,\text{V\,m}^{-1}

2.0 \times 10^{2}\,\text{V\,m}^{-1}