Three charges 2q,-q-q are located at the verticles of an equilateral triangle. At the centre of the triangle.
Correct answer: B. The electric field is non-zero, but the potential is zero.
- A. The electric field is zero, but the potential is non-zero.
- B. The electric field is non-zero, but the potential is zero.
- C. Both the electric field and potential are zero.
- D. Both the electric field and potential are non-zero.
Explanation
In an equilateral triangle with charges 2q, -q, and -q at the vertices, the potential at the center is calculated by summing the potentials due to each charge. Since potential is a scalar quantity, it can cancel out due to symmetry, resulting in zero potential despite the presence of charges. However, the electric field, being a vector quantity, does not cancel out completely due to the unequal charge 2q. Therefore, the electric field at the center is non-zero, but the potential is zero.
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