A solid metallic sphere has a charge `+3Q`. Concentric with this sphere is a conducting spherical shell having charge `-Q`. The radius of the sphere is `a` and that of the spherical shell is `b(bgta)` What is the electric field at a distance `R(a lt R lt b)` from the centreA. `(Q)/(2piepsilon_(0)R)`B. `(3Q)/(2piepsilon_(0)R)`C. `(3Q)/(4piepsilon_(0)R)`D. `(4Q)/(2piepsilon_(0)R^(2)`

A solid metallic sphere has a charge `+3Q`. Concentric with this spher

1.	A solid metallic sphere has a charge `+3Q`. Concentric with this sphere is a conducting spherical shell having charge `-Q`. The radius of the sphere is `a` and that of the spherical shell is `b(bgta)` What is the electric field at a distance `R(a lt R lt b)` from the centreA. `(Q)/(2piepsilon_(0)R)`B. `(3Q)/(2piepsilon_(0)R)`C. `(3Q)/(4piepsilon_(0)R)`D. `(4Q)/(2piepsilon_(0)R^(2)`
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