Question

State Biot Savart law, expressing it in the vector form. Use it to obtain the expression for the magnetic field at an axial point, distance 'd' from the centre of a circular coil of radius 'a' carrying current 'I'. Also, find the ratio of the magnitudes of the magnetic field of this coil at the centre and at an axial point for which d = a√3.

Answer 1

I didn't understand the importance of questions

Answer 2

Answer : 1/8

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