A region of space contains equipotential lines produced by static electric charges. Near point \(P\), the equipotential lines run vertically. Point \(P\) is located on the \(+20\text{ V}\) line, with a \(+30\text{ V}\) equipotential line located to its left and a \(+10\text{ V}\) equipotential line located to its right. Which of the following best describes the direction of the electric field at point \(P\) and provides the correct physical justification?