Question

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

(1) The field is non-zero and the potential is zero.

(2) The field is zero and the potential is non-zero.

(3) Both field and potential are non-zero.

(4) Both field and potential are zero.

Answer 1

(1) The field is non-zero and the potential is zero.

As shown in the figure, the resultant of fields E₁ , E₂ and E₃ can’t be zero. 

But the potential is