a. Two spheres have radii `a` and `b` and their centres are at a distance d
Channel: Doubtnut
Date: 2020-07-26

a. Two spheres have radii `a` and `b` and their centres are at a distance d apart. Show that the capacitance of this system is  `C=(4piepsilon_0)/(1/a+1/b+-2/d)`  provided that `d` is large compared with `a` and `b`.  b. Show that as `d` approaches infinity the above result reduces to that of two islotated spheres inseries.