Question

define dielectric strength of a medium what is its value for vacuum

Answer 1

Dear Student,
$$\begin{gathered} DielecctricstrengthofamediumisgivenbyK=\frac{\epsilon }{{\epsilon }_0} \\ \epsilon \to permittivityofmedium \\ {\epsilon }_0\to permittivityofspace \\ forspace \\ {K}_0=\frac{{\epsilon }_0}{{\epsilon }_0}=1 \end{gathered}$$
Regards