Question

Electric field due to a point charge $q$ at distance $r$ has magnitude :

• A. $\frac{q}{4\pi {\epsilon }_0{r}^3}$
• B. $\frac{q}{4\pi {\epsilon }_0{r}^2}$
• C. $\frac{q}{4\pi {\epsilon }_{0}r}$
• D. $\frac{q^2}{4\pi {\epsilon }_0{r}^2}$

Answer 1

The correct option is B $\frac{q}{4\pi {\epsilon }_0{r}^2}$

Electric field due to a point charge is inversely proportional as the square of $r$.