Question

Obtain an expression for electric field due to an infinitely long charged wire for class 12

Answer 1

Explanation:

We wish to find its electric field at a distance of r from it. Let a cylinder of radius r and height l be the Gaussian surface. Now at the top and bottom phases of cylinder i.e. its base and top E and dS are perpendicular to each other hence it does not contributes to electric flux. E = lambda / 2π(epsilon not)r.

Answer 2

We wish to find its electric field at a distance of r from it. Let a cylinder of radius r and height l be the Gaussian surface. Now at the top and bottom phases of cylinder i.e. its base and top E and dS are perpendicular to each other hence it does not contributes to electric flux. E = lambda / 2π(epsilon not)r.