# Quick Answer: Is Magnetic Field B Or H?

## Is B magnetic field?

A is still used for vector potential, B for magnetic field (or magnetic induction or flux density, depending who you ask), H for magnetic intensity, etc..

## What is the formula for magnetic field?

The magnetic field formula contains the c o n s t a n t μ 0 constant^{\mu_{0}} constantμ0. This is known as permeability of free space and has a v a l u e 0 μ value^{\mu}_{0} value0μ = 4 π × 1 0 − 7 ( T ⋅ m 4\pi \times 10^{-7} (T \cdot m 4π×10−7(T⋅m/ A).

## What is H in magnetic field?

The definition of H is H = B/μ − M, where B is the magnetic flux density, a measure of the actual magnetic field within a material considered as a concentration of magnetic field lines, or flux, per unit cross-sectional area; μ is the magnetic permeability; and M is the magnetization. …

## Where is magnetic field strongest?

Bar Magnet As can be visualized with the magnetic field lines, the magnetic field is strongest inside the magnetic material. The strongest external magnetic fields are near the poles. A magnetic north pole will attract the south pole of another magnet, and repel a north pole.

## What is the relation between B and H?

In addition to B, there is a quantity H, which is often called the magnetic field. In a vacuum, B and H are proportional to each other, with the multiplicative constant depending on the physical units. Inside a material they are different (see H and B inside and outside magnetic materials).

## What causes a magnetic field?

When an electric current flows it generates a magnetic field because an electric current is moving charges. Electromagnets are made from strong electric currents flowing through a coil of wire. … These flows of charged particles cause strong magnetic fields.

## Why do magnetic fields exist?

Magnetic fields occur whenever charge is in motion. As more charge is put in more motion, the strength of a magnetic field increases. Magnetism and magnetic fields are one aspect of the electromagnetic force, one of the four fundamental forces of nature.

## Why is B used for magnetic field?

One finds the ‘B’ used most often with MRI systems and is seen as dB/dt which is an expression of the change in amplitude over the change in time. ‘B’ being the amplitude or intensity of the field.

## What is the difference between H and B magnetic fields?

H is called magnemotive force, or mmf. B is called flux density. H is induced in the space around moving charge. B is caused by the magnetic properties of matter where H exists.

## What is B in magnetic field?

Magnetic Field Units A smaller magnetic field unit is the Gauss (1 Tesla = 10,000 Gauss). The magnetic quantity B which is being called “magnetic field” here is sometimes called “magnetic flux density”. An older unit name for the Tesla is Webers per meter squared, with the Weber being the unit of magnetic flux.

## How magnetic field is created?

As Ampere suggested, a magnetic field is produced whenever an electrical charge is in motion. The spinning and orbiting of the nucleus of an atom produces a magnetic field as does electrical current flowing through a wire. The direction of the spin and orbit determine the direction of the magnetic field.