Spannungssatz

Spannungssatz, also known as the voltage law or Kirchhoff's voltage law, is a fundamental principle in electrical circuit analysis. It states that the sum of the voltage drops around any closed loop in a circuit must equal the sum of the voltage sources within that loop. In simpler terms, electrical energy is conserved within a closed circuit.

This law can be expressed mathematically. For a closed loop containing voltage sources V1, V2, ... and voltage drops across components V_R1, V_R2, ..., the equation is: Sum of V_sources = Sum of V_drops. Alternatively, if we consider voltage drops as positive and voltage rises as negative, the sum of all voltages around any closed loop is zero.

The Spannungssatz is crucial for understanding how voltage distributes across series and parallel circuits. In a series circuit, the total voltage from the source is divided among the components. In a parallel circuit, the voltage across each branch is the same as the source voltage. By applying the Spannungssatz, engineers and students can calculate unknown voltages, analyze circuit behavior, and design electrical systems. It is a cornerstone alongside Kirchhoff's current law for solving complex circuit problems.