All About Biot Savart Law

Biot Savart Law

What Is Biot Savart Law?

Biot– Savart law is constant with both Ampere’s circuital law and Gauss’s theorem. The Biot Savart law is basic to magnetostatics, playing a role similar to that of Coulomb’s law in electrostatics.

The Biot-Savart law is an important method that calculates the vector electromagnetic field B at a point in space due to an electrical present flowing in a conductor. The vector r from the origin of the vector current element to the point in space has magnitude r and makes an angle \ theta to the vector current component dl. The instructions of the electromagnetic field B is identified by the right-hand man (screw) rule: 

Let fingers of the right-hand point in direction of the current component dl and turn fingers to satisfy the r vector, then your thumb is in the instructions of B.

Let’s use Biot-Savart discover B at the centre of a circular loop of radius R. 

The sine of the angle everywhere is one since the position vector and current element are perpendicular to each other, so we just need to integrate around the circumference of the circle. The resultant field is I/( 2R) in magnitude. When the present flows, tightly injuring numerous loops of current can form an electromagnet or solenoid.

Standard Examples


  • I = current
  • n = turns per unit length
  • R = radius of the loop
  • r = shortest distance from conductor to point of measurement

The Biot Savart Law states that it is a mathematical expression which shows the electromagnetic field produced by a stable electric present in the particular electromagnetism of physics. It tells the magnetic field towards the magnitude, length, direction, as well as closeness of the electric present.

Biot Savart Law Declaration & Derivation

The Biot-Savart law can be mentioned as:

Where, k is consistent, relying on the magnetic residential or commercial properties of the medium and system of the units employed. In the SI system of the unit,

Therefore, the final Biot-Savart law derivation is,

Let us think about a long wire carrying a current I and also consider a point p in the space. Here, r is a distance-vector which makes an angle θ with the instructions of current in the infinitesimal portion of the wire.

The Biot-Savart law specifies how the worth of the electromagnetic field at a specific point in space from one short sector of a current-carrying conductor depends upon each factor that influences the field.

What Are Biot Savart Law And Its Application?

The Biot Savart Law specifies that it is a mathematical expression which shows the magnetic field produced by a stable electric present in the particular electromagnetism of physics. It tells the electromagnetic field toward the magnitude, length, instructions, in addition to the closeness of the electrical existing.

What Does Faraday’s Law Mean?

Faraday’s law states that the outright worth or magnitude of the flow of the electric field E around a closed loop is equal to the rate of modification of the magnetic flux through the area enclosed by the loop. … The formula below expresses Faraday’s law in mathematical kind.

Why Is Faraday’s Law Important?

Faraday’s law of induction is one of the important concepts of electricity. It looks at the way changing magnetic fields can cause current to flow in wires. Basically, it is a formula/concept that describes how the potential difference (voltage difference) is created and how much is created.

What Is Ampere’s Law Equation?

Ampere’s law enables us to determine magnetic fields from the relation between the electric currents that create these electromagnetic fields. It mentions that for a closed path the amount over aspects of the part of the electromagnetic field is equal to the electrical current increased by the empty’s permeability.