Question 830: Electrostats & Capacitance

Question

Three charges $2 q,-q$ and $-q$ are located at the vertices of an equilateral triangle. At the centre of the triangle

Accepted Answer

From charge configuration, at the centre electric field is non-zero. Potential at the centre due to $2 q$ charge $V_{2 q}=\frac{2 q}{r}$
and potential due to $-$q charge
$\mathrm{V}_{-\mathrm{q}}=-\frac{\mathrm{q}}{\mathrm{r}} (\mathrm{r}=$ distance of centre point $)$
$	herefore \quad$ total potential $\mathrm{V}=\mathrm{V}_{2 \mathrm{q}}+\mathrm{V}_{-\mathrm{q}}+\mathrm{V}_{-\mathrm{q}}=0$

Answer

the field is zero but potential is non-zero.

Answer

the field is non-zero but potential is zero.

Answer

both field and potential are zero.

Answer

both field and potential are non-zero.

Electrostats & Capacitance

Three charges 2 q,-q and -q are located at the vertices of an equilateral triangle. At the centre of the triangle

Choose the correct answer: