A region of space contains four parallel equipotential lines labeled \(10 \, \text{V}\), \(20 \, \text{V}\), \(30 \, \text{V}\), and \(40 \, \text{V}\), as shown in the diagram. A point charge \(q = +2.0 \, \mu\text{C}\) is moved along a curved path from point \(P\) on the \(10 \, \text{V}\) line to point \(Q\) on the \(40 \, \text{V}\) line. What is the work done on the point charge by the electric field during this displacement?