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abrowaqas
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Why do we take a point charge always while estimating the electric field intensity of a system of charge? as in Coulomb's and Gauss's Law etc.
Electric field intensity is a measure of the strength of the electric field at a particular point in space. It is defined as the force per unit charge that a charged particle experiences at that point.
The electric field intensity of a point charge can be calculated using the equation E = kq/r^2, where E is the electric field intensity, k is the Coulomb's constant, q is the charge of the point charge, and r is the distance from the point charge to the point where the electric field is being measured.
The electric field intensity of a point charge is affected by the magnitude of the charge, the distance from the point charge, and the medium in which the electric field is being measured. In a vacuum, the electric field intensity follows an inverse square law, meaning it decreases with distance squared. In other media, such as air or water, the electric field intensity may also be affected by the permittivity of the medium.
The electric field intensity and electric potential are related through the equation E = -∇V, where E is the electric field intensity and V is the electric potential. This means that the direction of the electric field is in the direction of decreasing electric potential.
Understanding electric field intensity is important in many fields, such as electrical engineering, physics, and chemistry. It allows us to predict the behavior of charged particles in a given electric field and is essential for designing and analyzing electric circuits, as well as understanding the properties of atoms and molecules.