# What is ideal magnetic dipole?

## What is ideal magnetic dipole?

Abstract. We introduce the concept of tunable ideal magnetic dipole scattering, where a nonmagnetic nanoparticle scatters light as a pure magnetic dipole. High refractive index subwavelength nanoparticles usually support both electric and magnetic dipole responses.

What is Z in magnetic field?

The exact equation for the field on the axis of a solenoid is: where N is the number of turns, I is the current, a is the radius of the solenoid, and z is the axial distance.

What is an oscillating dipole?

To understand the meaning of oscillating electric dipole, first we take two opposite charges located at a distance d along z-direction at points A and B. Basically, this pairs of charges form an electric dipole with associated dipole moment (p) being directed along z-direction (as shown in figure 1).

### What is magnetic dipole and dipole moment?

A magnetic dipole is a magnetic north pole and a magnetic south pole separated by a small distance. Magnetic dipole moments have dimensions of current times area or energy divided by magnetic flux density. The unit for dipole moment in meter–kilogram– second–ampere is ampere-square meter.

What is magnetic dipole formula?

What is the definition and formula for magnetic dipole moment? Definition: A vector that connects the aligning torque on an item caused by an external magnetic field to the field vector itself is called the Magnetic dipole moment. tau=mB is the formula for the connection.

What is the Amperian loop?

It is an imaginary closed loop around a current carrying conductor through which ampere’s law is applied to that conductor.

#### What is positive z direction?

The Z axis is perpendicular to the ground plane; think of it as a line drawn between the device and the center of the Earth. The value of the Z coordinate is positive upward (away from the center of the Earth) and negative downward (toward the center of the Earth).

What is dipole induced dipole forces?

Dipole-Induced Dipole Forces A dipole-induced dipole attraction is a weak attraction that results when a polar molecule induces a dipole in an atom or in a nonpolar molecule by disturbing the arrangement of electrons in the nonpolar species.

What is a magnetic dipole?

A magnetic dipole is the limit of either a closed loop of electric current or a pair of poles as the dimensions of the source are reduced to zero while keeping the magnetic moment constant. It is a magnetic analogue of the electric dipole, but the analogy is not complete.

## What is a multipole expansion of magnetic scalar potential?

The magnetic scalar potential ψ produced by a finite source, but external to it, can be represented by a multipole expansion. Each term in the expansion is associated with a characteristic moment and a potential having a characteristic rate of decrease with distance r from the source.

What does the ring represent in the magnetic dipole diagram?

The ring represents the current loop, which goes into the page at the x and comes out at the dot. In classical physics, the magnetic field of a dipole is calculated as the limit of either a current loop or a pair of charges as the source shrinks to a point while keeping the magnetic moment m constant.

Why does magnetic potential drop off faster at large distances?

The higher the order, the faster the potential drops off. Since the lowest-order term observed in magnetic sources is the dipolar term, it dominates at large distances.