A point charge `q` si located at a distance `r` from the centre `O` of an uncharged conducting conducting spherical layer whose inside and outside radii are equal to `R_(1)` and `R_(2)` respectively. Find the potentail at the point `O` if `r lt R_(1)`.A. `((1)/(r )-(1)/(a)+(1)/(b))`B. `((1)/(a)-(1)/(r )+(1)/(b))`C. `((1)/(b)-(1)/(c )-(1)/(r))`D. `((1)/(a)-(1)/(b )-(1)/(r))`

A point charge `q` si located at a distance `r` from the centre `O` of

1.	A point charge `q` si located at a distance `r` from the centre `O` of an uncharged conducting conducting spherical layer whose inside and outside radii are equal to `R_(1)` and `R_(2)` respectively. Find the potentail at the point `O` if `r lt R_(1)`.A. `((1)/(r )-(1)/(a)+(1)/(b))`B. `((1)/(a)-(1)/(r )+(1)/(b))`C. `((1)/(b)-(1)/(c )-(1)/(r))`D. `((1)/(a)-(1)/(b )-(1)/(r))`
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