What is the biot Savart law?
Answers
Answer:
In physics, specifically electromagnetism, the Biot–Savart law (/ˈbiːoʊ səˈvɑːr/ or /ˈbjoʊ səˈvɑːr/)[1] is an equation describing the magnetic field generated by a constant electric current. It relates the magnetic field to the magnitude, direction, length, and proximity of the electric current. The Biot–Savart law is fundamental to magnetostatics, playing a role similar to that of Coulomb's law in electrostatics. When magnetostatics does not apply, the Biot–Savart law should be replaced by Jefimenko's equations. The law is valid in the magnetostatic approximation, and consistent with both Ampère's circuital law and Gauss's law for magnetism.[2] It is named after Jean-Baptiste Biot and Félix Savart, who discovered this relationship in 1820.
Answer:
Consider a current loop of radius R with a current 'i' flowing in it. If we wish to find the electric field at a distance l from the center of the loop due to a small element ds, we can use the Biot-Savart Law as: d→B = μ04π i d→s ×^rr2.