Magnetic dipole - Wikipedia
In electromagnetism, a magnetic dipole is the limit of either a closed loop of electric current or a pair of poles as the size of the source is reduced to zero while keeping the magnetic moment constant. It is a magnetic analogue of the electric dipole, but the analogy is not perfect.
Dipole - Wikipedia
Dipole. The magnetic field of a sphere with a north magnetic pole at the top and a south magnetic pole at the bottom. By comparison, Earth has a south magnetic pole near its north geographic pole and a north magnetic pole near its South Pole. In physics, a dipole (from Ancient Greek δίς (dís) 'twice' and πόλος (pólos) 'axis') [1][2][3 ...
Magnetic dipole | Definition, Formula, Units, Examples, & Facts ...
magnetic dipole, generally a tiny magnet of microscopic to subatomic dimensions, equivalent to a flow of electric charge around a loop. Electrons circulating around atomic nuclei, electrons spinning on their axes, and rotating positively charged atomic nuclei all are magnetic dipoles.
Dipole Magnetic Field and Equations of Magnetic Field Lines. 1.1. Dipole Magnetic Field. Since ∇ ⋅ B = 0 we can define. B = ∇ × A (1.1) where A is called the vector potential. We use the bold face font to denote vector. For static. magnetic field, we have.
Magnetic Dipole - Physics Book - gatech.edu
2018年11月26日 · Magnetic Dipole Moment and Connection with Torque on a Coil. The magnetic dipole moment represents the magnitude of the field of the dipole, essentially its magnetic potential. The most common unit for the dipole moment is Ampere-square meters which is derived from how you calculate the moment of a coil of wire.
The field is equivalent to that from a tiny bar magnet (a magnetic dipole). We define the magnetic dipole moment to be a vector pointing out of the plane of the current loop and with a magnitude equal to the product of the current and loop area: μ.
5.4: Magnetic Dipole Moment and Magnetic Dipole Media
Magnetic dipole and its potential. A(r) = μ0 4πm × r r3, where the vector m, defined as 40. m ≡ 1 2∫Vr × j(r)d3r, is called the magnetic dipole moment of the system – that itself, within the long-rang approximation (90), is called the magnetic dipole.
Properties of Magnetic Dipoles. To visualize the complex geometry of cosmic magnetic fields it is useful to represent the field by means of magnetic field lines, that is, lines that are every where parallel to the magnetic field vector. Since dipolar geometry underlies many examples of cosmic magnetic fields, we examine the dipole case in this ...
description of an electric field produced by an electric dipole and the magnetic flux density produced by a magnetic dipole is a constant c: Qd electric dipole →=c ε magnetic dipole S→=cIµ 0 Recall that we defined a dipole moment for electric dipoles, where: p =Qd Clearly, the analogous product to Qd for a magnetic dipole is SI.
20.1 Magnetic Fields, Field Lines, and Force - OpenStax
A magnetic dipole produces a magnetic field, and, as we will see in the next section, moving magnetic dipoles produce an electric field. Thus, electricity and magnetism are two intimately related and symmetric phenomena.