EMG-24

Loop dipole m

Magnetic moment of a current loop.

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GoverningLoop dipole m

Governing equation

m=I A

where

I: I (A)
A: A (cm²)
m: Loop dipole m (A·m²)

Lecture brief

Historical brief

Coulomb, Gauss, Ampère, Faraday and Maxwell (1861–65) unified charge, current and light. The lab computes fields, induction, Poynting flux and the electromagnetic wave in SI. This sheet (EMG-24 — Loop dipole m) is the form associated with Loop dipole m. Working symbols: $I$ , $A$ $\rightarrow$ $m$ . Magnetic moment of a current loop. Pedagogical SI sheet with a live model and a swept parameter.

Purpose

Purpose: compute

m

from

I

A

in Electromagnetism via

m=I A

Magnetic moment of a current loop. Use it when a real electromagnetism question must be answered in SI before a code check.

Live realistic example

In symbols

Live case. Given

I = 2.000\,\mathrm{A}

A = 12.000\,\mathrm{cm^{2}}

, the governing relation

m=I A

yields

m = 0.002\,\mathrm{A·m^{2}}

. One governing identity, SI units, a single sweep on the sheet. Move a slider: the numbers are this situation, not a canned story.

Calculator

Inputs

I I2 AA A12 cm²

Outputs

Loop dipole m m0.002 A·m²

Reading speed

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Narration of this film

One governing identity, SI units, a single sweep on the sheet.

Magnetic moment of a current loop. Pedagogical SI sheet with a live model and a swept parameter.

Reading speed

Watch on YouTube