Question: A spherical capacitor consists of a spherical conducting shell of radius b and charge Q concentric with a smaller conducting sphere of radius a and

A spherical capacitor consists of a spherical conducting shell of radius b and charge –Q concentric with a smaller conducting sphere of radius a and charge Q.
(a) Find the capacitance of this device.
(b) Show that as the radius b of the outer sphere approaches infinity, the capacitance approaches the value α/ke = 4 πε0α.

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