Question

Two parallel plates have equal and opposite charges. When space

was evacuated, the electric field was 2.80 x 105 V/m. When it

was filled with a dielectric material, the electric field was 1.20 x

105 V/m. What is the dielectric constant? What is the material?

Answer 1

$\varepsilon=\frac{E_0}E=2.33,$

polyethylene.