Four charges +Q,-Q,+Q,-Q are placed at the corners of a square taken in order. At the centre of the square.
Correct answer: B. E=0,V≠ 0
- A. E=0,V=0
- B. E=0,V≠ 0
- C. E≠0,V=0
- D. E≠0,V≠0
Explanation
In summary, the correct answer is E=0, V≠0, because at the center of the square, the electric field vectors cancel out due to symmetry, resulting in zero electric field, while the potentials from the charges add up to give a non-zero electric potential.
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About Electric Field
An electric field is the force experienced per unit positive test charge, with the field of a point charge given by E = kQ/r² and directed away from positive charges or toward negative charges. Questions involve field lines, superposition and force on a charge, while electric field must be distinguished from electric potential.
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