9702/51/O/N/18: A student is investigating the electric potential near a charged metal sphere. The sphere is suspended from the ceiling as shown in Fig. 2.1.
A flame probe is used to measure the potential V at a distance L from the surface of the sphere. The experiment is repeated for different distances from the sphere. It is suggested that V and L are related by the equation
\(V = \dfrac{Q}{4 \pi \epsilon_0 0(L + a)}\)
where Q is the charge on the sphere, a is the radius of the sphere and ε0 is the permittivity of free space.
Solutions for October/November 2018 Paper 5 variant 1 question 2 data analysis.