A parallel-plate capacitor has circular plates of radius \(R=\) \(0.10 \mathrm{~m}\) and a plate separation distance \(d=0.10 \mathrm{~mm}\). While a current charges the capacitor, the magnitude of the potential difference between the plates increases by \(10 \mathrm{~V} / \mu \mathrm{s}\). What is the magnitude of the magnetic field between the plates at a distance \(R\) from the horizontal axis of the capacitor?