Question

A charged conductor produces an electric field. of intensity $10^3\, V/m$ just outside its surface in vacuum. Then, it produces the electric field of intensity $E$ just outside its surface, when it is placed in a medium of dielectric constant $4$. The value of $E$ will be

• A. $400\, V/m$
• B. $450\, V/m$
• C. $250\, V/m$
• D. $150\, V/m$

Answer 1

Answer: (C)

Given, electric field produced by charged conductor in vacuum,
$E_{0}=10^{3} V / m$
Electric field produced by charged conductor; when it is placed in medium of
dielectrics $(K=4) \text { is } E=\frac{E_{0}}{K}=\frac{10^{3}}{4}=250 V / m$