A circular-shaped circuit of radius RO, containing a resistor with resistance R and a capacitor with capacitance C, is situated with its plane perpendicular to a spatially uniform magnetic field B directed perpendicularly into the page. Starting at time t=0, the voltage difference across the capacitor plates is observed to increase with time according to the relation, Vc =Vb-Va =Vo (1-e-/), where Vo is a positive number. (a) Is the capacitor in the process of charging or discharging? Explain. (b) Where is the current through this circuit stemming from? (c) Explain conceptually whether the magnetic field is increasing or decreasing. (d) Determine the rate at which the magnetic field magnitude changes with time

A circular-shaped circuit of radius RO, containing a resistor with resistance R and a capacitor with capacitance C, is situated with its plane perpendicular to a spatially uniform magnetic field B directed perpendicularly into the page. Starting at time t=0, the voltage difference across the capacitor plates is observed to increase with time according to the relation, Vc =Vb-Va =Vo (1-e-/), where Vo is a positive number. (a) Is the capacitor in the process of charging or discharging? Explain. (b) Where is the current through this circuit stemming from? (c) Explain conceptually whether the magnetic field is increasing or decreasing. (d) Determine the rate at which the magnetic field magnitude changes with time