Question

Two parallel plates have equal and opposite charge. When the space between them is evacuated. the electric field between the plates $2\times {10}^{5}V/m.$ When the space is filed with dielectric the electric field becomes ${10}^{5}V/m$ The dielectric constant of he dielectric material is

• A. $2$
• B. $4$
• C. $5$
• D. $9$

Answer 1

The correct option is A $2$

Dielectric constant$:-$

$K=\frac{E_0}{E}$

$=\frac{2\times {10}^5}{1\times {10}^5}=2$

Hence,

option $\left(A\right)$is correct answer