Electric Volume Charge Density
Electric Charge Density
The symbol in Equation  is the electric volume charge density:
The greek symbol pho () typically denotes electric charge, and the subscript V indicates it is the volume charge density. Since charge is measured in Coulombs [C], and volume is in meters^3 [m^3], the units of the electric charge density of Equation  are [C/m^3]. Note that since electric charge can be negative or positive, the charge density can be negative, positive or zero.
Simple Charge Density Example
Suppose we have +5 [C] of electric charge uniformly (evenly) spread within a sphere of radius 2 meters. What is the electric volume charge density in the sphere?
The solution is simple:
The electric charge is known as a source in Maxwell's Equations, as it gives rise to Electric and Magnetic Fields.
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