For a point charge, the electrostatic field varies as \( \frac{1}{\mathrm{r}^{2}}\).
A. I only
B. II only
C. III only
D. I, II and III
Answer:C
For a point charge, the electrostatic field varies as \( \frac{1}{\mathrm{r}^{2}}\).
A. I only B. II only C. III only D. I, II and III