Enter your Point Charge, Distance from Charge, and Medium into the Electric Potential Calculator to find the Electric Potential at any point in space — plus add a Test Charge to also get the Electric Potential Energy and Electric Field Strength at that location.
Electric Potential
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Electric Potential Energy
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Electric Field Strength
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Coulomb's Constant
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Electric potential is the amount of work required to move a unit positive charge from infinity to a specific point in an electric field. It's measured in volts (V) and represents the electric potential energy per unit charge.
Use the formula V = kq/r, where V is electric potential, k is Coulomb's constant (8.99 × 10⁹ N⋅m²/C²), q is the point charge in Coulombs, and r is the distance from the charge in meters.
Yes, electric potential can be negative. If the point charge is negative, the electric potential will be negative. The sign depends on the sign of the source charge creating the potential.
Electric potential difference, also called voltage, is the difference in electric potential between two points. It represents the work done per unit charge to move a charge between those points.
Electric potential is a scalar quantity. Unlike electric field which has direction, electric potential only has magnitude and sign. Multiple potentials can be added algebraically.
The SI unit of electric potential is the volt (V), which equals one joule per coulomb (J/C). Other common units include kilovolts (kV) and millivolts (mV).
By convention, the electric potential at infinity is defined as zero. This serves as the reference point for measuring electric potential at any finite distance from a charge.
Electric potential is inversely proportional to distance. As you move farther from a point charge, the electric potential decreases. At twice the distance, the potential becomes half as strong.