Question

An insulated charged conducting sphere of radius $5cm$ has a potential of $10V$ at the surface. What is the potential at centre?

• A. $10V$
• B. $zero$
• C. same as that at $5cm$ from the surface
• D. same as that at $25cm$ from the surface

Answer 1

The correct option is B $zero$

The electric potential at any point is given by V= $\frac{q}{4\pi {ϵ}_{0}kr}$

Here k is the dielectric constant of the material medium. For conducting materials, k is infinite, Hence $V=0$ at the centre.