An ideal \(LC\) circuit consists of an inductor of inductance \(L\) and a parallel-plate capacitor of capacitance \(C\) with horizontal plates of area \(A\). At time \(t = 0\), the top plate has charge \(+Q_0\), the bottom plate has charge \(-Q_0\), and the current in the circuit is zero. The angular frequency of oscillation is \(\omega = \dfrac{1}{\sqrt{LC}}\), and the maximum magnitude of the electric field between the capacitor plates is \(E_{\text{max}} = \dfrac{Q_0}{A\varepsilon_0}\). At time \(t = \dfrac{\pi}{3\omega}\), which of the following correctly identifies the magnitude \(E\) of the electric field between the plates and whether the magnitude of the field is increasing or decreasing?