Q. A solid spherical conductor has charge +Q and radius R. It is surrounded by a solid spherical shell with charge -Q, innerradius 2R, and outer radius 3R. Which of the following statements is true?
(i)The electric potential has a maximum magnitude at C and the electric field has a maximum magnitude at A
(ii) The electric potential has a maximum magnitude at D and the electric field has a maximum magnitude at B.
(iii) The electric potential at A is zero and the electric field has a maximum magnitude at D.
(iv) Both the electric potential and electric field achieve a maximum magnitude at B.
Answer: (iv) Both the electric potential and electric field achieve a maximum magnitude at B.
As all other statements seem incorrect in context with the given figure.