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What is the electric potential at point P at the center of the square if the electric potential is zero at infinity? Use q, d and ε0?
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- Steve4PhysicsLv 72 years agoFavorite Answer
At P:
The potentials from the +q and -q cancel because of symmetry.
The potentials from the +4q and -4q cancel because of symmetry.
The potentials from the +5q and -5q cancel because symmetry.
So we are left with the potentials from the two -2q charges, each a distance d from P
V = 2 x (-2q)/(4πε₀d) = -4kq/(4πε₀d)
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