A solid metal sphere with radius $R$ is isolated in space. The sphere carries a positive charge so that the electric potential at its surface is $V_S$. The electric field strength at the surface is $E_S$.
(a)[3]
On the axes in Fig. 6.1, indicate how the electric potential changes with distance $x$ from the sphere’s centre for $x = 0$ to $x = 3R$.
(b)[3]
On the axes in Fig. 6.2, indicate how the electric field strength changes with distance $x$ from the centre of the sphere for $x = 0$ to $x = 3R$.
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Potential remains at $V_s$ for $x=0$ to $x=R$” …