Assume three concentric conducting spheres where charge `q_(1)` and `q_(2)` have been placed on inner and outer sphere where as middle sphere has been earthed .Find the charge on the outer surface of middle spherical conductor

Options

A. `-(r_(2))/(r_(3))q_(2)`
B. `-q_(1)`
C. `-q_(2)`
D. `(r_(2))/(r_(3))q_(1)`

Answer

1

Explanation

`(q_(1))/(r_(2))+(q-q_(1))/(r_(2))+(q_(3))/(r_(3))=0:.q=(-r_(2))/(r_(3))q_(2)`