159 B
159 B
[$$]\mathbf{E} = \frac{1}{4 \pi \varepsilon_0} \cdot \frac{q}{r^2} \mathbf{e_r} = \frac{1}{4 \pi \varepsilon_0} \cdot \frac{q}{r^3} \mathbf{r}[/$$]
[$$]\mathbf{E} = \frac{1}{4 \pi \varepsilon_0} \cdot \frac{q}{r^2} \mathbf{e_r} = \frac{1}{4 \pi \varepsilon_0} \cdot \frac{q}{r^3} \mathbf{r}[/$$]