The surface charge density of a non conducting disc of radius 'R' varies as , where b is a positive constant and r is the distance from the centre of the disc.
Find the electric field caused by the disc at a point along the axis of the disc and a distance x from its centre.
Details and assumptions :
Find the absolute value of electric field at distance in SI units.
is permittivity of free space.
Round off your answer to the nearest integer.
I Would advice not to use wolfram alpha for performing integration as it would be a nice exercise to evaluate that integral with hand