A solid metal sphere of radius R having charge q is enclosed inside the concentric spherical shell of inner radius a and outer radius b as shown in the figure. The approximate variation electric field E → , as a function of distance r , from centre O , is given by:

Step-by-step solution

In the above question, the variation of the electric field with r , is, For 0 < r < R E = 0 , for  R ≤ r ≤ a E = k Q r 2 ,   for  a < r ≤ b E = 0   &   r > b E = k Q r 2 , so the correct graph is,