In Figure P31.60, a uniform magnetic field decreases at a constant rate dB/dt =- K, where K is a positive constant. A circular loop of wire of radius a containing a resistance R and a capacitance C is placed with its plane normal to the field.
(a) Find the charge Q on the capacitor when it is fully charged.
(b) Which plate is at the higher potential?
(c) Discuss the force that causes the separation of charges.

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