Define linear charge density. Mention its SI unit.

Linear charge density, denoted by the symbol λ (lambda), is a physical quantity used to describe the distribution of electric charge along a one-dimensional object, such as a straight wire or rod. It represents the amount of charge per unit length along the object.

Mathematically, linear charge density (λ) is defined as:

λ = Q / L

Where:

λ is the linear charge density (in coulombs per meter, C/m).
Q is the total electric charge along the one-dimensional object (in coulombs, C).
L is the length of the object (in meters, m).
The SI unit of linear charge density is coulombs per meter (C/m). It tells us how much charge is present per unit length along the linear object, providing a measure of the charge distribution.