1.

A conducting sphereA of radius a, with charge Q, is placed concentrically inside a conducting shell B of radius b. B is earthed C is the common centre of the A and B.

Answer»

The FIELD is at a distance r from C, where `altrltb " ""is"(1)/(4pi epsilon_(0))(Q)/(r^(2))`
The potential at a distance r from C, where a `altrltb " ""is"(1)/(4pi epsilon_(0))(Q)/(r)`
The potential difference betwee A and B is `(l)/(4pi epsilon_(0))Q((1)/(a)-(1)/(b))`
The potential at a distance r from C, where `altrltblt,(1)/(4piepsilon_(0))Q((1)/(a)-(1)/(b))`

ANSWER :A::C::D


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