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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Electrostatics describes forces between charges through Coulomb's law, electric fields and field intensity, then uses electric potential to measure energy per unit charge. Capacitors store charge and electrical energy, with capacitance depending on geometry and dielectric material, not simply on the amount of charge present.
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