A charged spherical conductor has a radius $r$ - AQA - A-Level Physics - Question 21 - 2018 - Paper 2

To find the potential ($V$) of a charged spherical conductor at its surface, we can use the relationship between electric field ($E$) and potential. The electric potential is given by the formula:

$V = E imes r$

where:

• $E$ is the electric field strength at the surface, and
• $r$ is the radius of the spherical conductor.

Thus, the correct answer is:

Answer: (A) $rE$