Ohm’s law states that the current in an electrical circuit is directly proportional to the voltage and inversely proportional to the resistance. The relationship can be summarized by a single mathematical equation: Current = Electromotive Force/Resistance or, stated in electrical units: I= V/R
George Simon Ohm discovered one of the most important laws for analyzing circuits.
Kirchoff’s Current Law (KCL) states that the algebraic sum of the currents at any junction or node in an electrical circuit is equal to zero. Simply stated, all the current that enters a junction or node is equal to all the current that leaves the junction or node.
Kirchoff’s Voltage Law (KVL) states that the algebraic sum of the electromotive forces and voltage drops around any closed electrical circuit loop is zero. Simply said, the addition of all differences of potential in a closed circuit will equal zero.
Gustav Kirchoff developed two laws (KCL and KVL) for analyzing circuits.