Browsing: Electricity and Magnetism

Physics guides to electric charge, fields, potential, voltage, circuits, and magnetism, with formulas, units, and worked examples.

Electricity and Magnetism

SI Unit for Electric Potential: The Volt, Its Definition, Equivalent Forms, and Worked Examples

By Maurice CotterellOctober 20, 20260

The SI unit for electric potential is the volt (V), where 1 V = 1 J/C. The volt also measures potential difference, which is called voltage. In SI base…

Electricity and Magnetism

Electric Potential Energy Formula: Equations, Units, Sign Rules, and Worked Examples

By Maurice CotterellOctober 19, 20261

The electric potential energy formula for 2 point charges is U = kq₁q₂/r, where k = 8.99 × 10⁹ N·m²/C². The SI unit is the joule….