Class 12th - Magnetic Dipole Moment of Revolving Electron - Gyromagnetic Ratio | Tutorials Point

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2x

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Sir I have a question What is the nature of the magnetic field when it is radial? Please Sir

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[@legaata]

Can you really model the magnetic field of an orbiting electron the same way you model the field of electrons in large scale motion?

[@shashwatgaur7258]

Here's my view on it: The revolving electron (assuming bohr's idea of defined circular orbits hold and for once ignoring sommerfield's elliptical correction to the orbits) is essentially a current loop. The equivalent current of the loop can be derived by applying a simple model. Assume a cross section perpendicular to one of the points along the electron's trajectory through which it will pass. The current through the cross section is essentially charge of the electron times the frequency of the revolving electron which will be related to it's angular velocity as f=w/2π, w being the angular velocity / frequency of the revolving electron. This gives I=ef=ew/2π Now, you can map the magnetic field because of the electron's orbital motion in the same manner as you would for a current carrying coil (you can look for how the fields look for a coil over the internet.) This would be in accordance with Ampere's prediction that all magnetic phenomenon arise due to current loops. But I must state here that this is not the complete picture. Since as per quantum theory, there is no defined trajectory for an electron. So mapping the field generated by its orbital motion is not that simple . Also, electrons also have an intrinsic magnetic moment, which give rise to another magnetic field. So the resultant field will be produced as vector sum of the two separate fields. Also, the electron is not stationary, the resultant field will be a dynamic one, changing with time. I hope this helped, as I only know about classical theory and don't have much idea of quantum theory. Have a nice day! Or night......

[@sameervgotagi5844]

y is the angular momentum of the electron is opposite in direction angular moment?

[@bhashkarkelzarkar3842]

Thanku sir

[@KaranGosaiLE]

What is the direction of magnetic dipole moment

[@DoxzaynabRx]

"The direction of area vector is the direction of magnetic moment" , since m=i × A; where A is area vector perpendicular to the plane of loop. Or else u can use "curled-straight- right hand rule" , 'Imagine grasping the loop in ur right hand such that the fingers curl around the loop in the direction of current, then extended thumb will point in the direction of dipole moment'.

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South to North pole

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