Question

If potential at centre of uniformly charged ring is v0 then electric field at its centre is

Answer 1

potential is zero then no voltage and current flow so the electric filed is zero

Answer 2

Answer:

$\mathrm{E}=\frac{\mathrm{kq}}{\mathrm{r}^{2}}=\frac{\mathrm{VR}}{\mathrm{r}^{2}}$

Explanation:

For hollow sphere,$\mathrm{V}=\mathrm{V}_{\text {surface }}=\frac{\mathrm{kq}}{\mathrm{R}}$

The electric field at a distance $\mathrm{r}$ outside the sphere is $\mathrm{E}=\frac{\mathrm{kq}}{\mathrm{r}^{2}}=\frac{\mathrm{VR}}{\mathrm{r}^{2}}$

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