Question

State biot-savart law,expressin ut in vector form. use it to obtain the expression for the magnetic field at an axial point, distance 'd' from rhe centre of a circular coil of radius 'a' carrying current 'i'.also find the ratio of the magnitudes of the magnitudes of the magnetic field of this coil at the centre and at an axial point which d=

Answer 1

this is derivation for magnetic field at axis of circular current carrying coil