12
Jul
Formula Of Magnetic Moment. The magnetic moment associated to the current of an electron revolving is given as. If an electric current I flows in a plane coil of area A recall that area is a vector quantity hence the boldface the torque it. M p l. The first based on the number of unpaired electrons n and the second based on the electron spin quantum number S.
The difference in energy between aligned and anti-aligned is where ΔU 2μB The expression for magnetic potential energy can be developed from the expression for the magnetic torque on a current loop. The magnetic moment is the magnetic moment per turn times the number of turns μ NabI. P displaystyle p of its poles and on the vector. Essentially they behave as tiny bar magnetsMagnetic moment is a. The direction of μ makes an angle of 60 o with the x-axis. The magnetic moment can be considered to be a vector quantity with direction perpendicular to the current loop in the right-hand-rule direction.
Displaystyle mathbf m pmathbf l.
The formula used to calculate the spin-only magnetic moment can be written in two forms. The magnitude and direction of the torque is given by the equation 1721 τ p B. The moment is defined as. For example the loop in Figure 421 would have a magnetic moment that points out of the page. The magnetic moment associated to the current of an electron revolving is given as. The torque is given by As seen in the geometry of a current loop this torque tends to line up the magnetic moment with the magnetic field B so this represents its lowest energy configuration.