Displacement Current Questions

A parallel plate capacitor made of circular plates is being charged such that the surface charge density on its plates is increasing at a constant rate with time. The magnetic field arising due to displacement current is:

A $100\Omega$ resistance and a capacitor of $100\Omega$ reactance are connected in series across a $220\text{V}$ source. When the capacitor is $50\%$ charged, the peak value of the displacement current is: