# Essay-Applications of Gauss Law

**Tutor description**

Consider a thin infinitely long straight line charge of linear charge density λ. Let P be the point at a distance ‘a’ from the line. To find electric field at point P, draw a cylindrical surface of radius ‘a’ and length l. If E is the magnitude of electric field at point P, then electric flux through the Gaussian surface is given by, Φ = E × Area of the curved surface of a cylinder of radius r and length

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