Linjeladningstæthed

Linjeladningstæthed is a term used in physics and electrical engineering to describe the distribution of electric charge along a line. It is defined as the electric charge per unit length. The symbol for linjeladningstæthed is typically the Greek letter lambda (λ).

Mathematically, linjeladningstæthed is expressed as λ = Q/L, where Q is the total electric charge and L is the length of the conductor or line over which the charge is distributed. The SI unit for linjeladningstæthed is coulombs per meter (C/m).

Linjeladningstæthed is a useful concept for analyzing the electric field produced by charged objects that are long and thin, such as wires or rods. Instead of considering discrete point charges, linjeladningstæthed allows for a continuous distribution of charge to be treated more conveniently, often using integration.

Applications of linjeladningstæthed can be found in various areas. For example, it is used in the calculation of electric fields and potentials around charged conductors, in antenna theory to describe the charge distribution on radiating elements, and in the study of electrostatic forces between charged lines. Understanding linjeladningstæthed is fundamental for comprehending electrostatics and electromagnetism in situations involving one-dimensional charge distributions.