Using Biot-Svart's law, derive the expression for the magnetic field in vector form at a point on the axis of a circular current loop.

Explanation

From text, we get the expression,
`B=(mu_(0)NI)/(2)*(r^(2))/((r^(2)xx^(2))^(3//2))`
Here, the centre of the coil has been taken the origin and the direction of the axis as the x-axis.
`:. vecB=(mu_(0)NI)/(2)*(r^(2))/((r^(2)+x^(2))^(3//2))i`