What is BIOT SAVART'S law? & how it is related with AMPERE'S circuital law?

Question

What is BIOT SAVART'S law? & how it is related with AMPERE'S circuital law?

Answer 1

The Biot-Savart Law is a mathematical expression used to find the magnetic field at a point which at a distance away from a current carrier.

http://hyperphysics.phy-astr.gsu.edu/Hba...

Ampere's Law is more concerned with the space surrounding the current carrier instead of a single point.

http://hyperphysics.phy-astr.gsu.edu/hba...

Answer 2

dB = μ . I . ds / 4πr²

Where ds is the subdivision on the surface and dB is it´s magnetic field density. And r is the radius of the circuit.

They can both be used to determine the magnetic field on the perimeter of any geometrical form (surrounding the magnetic field´s source), but when it´s on the perimeter of a geometrical shape, especially and circuit!