please answer electromagnatic 1.[50 points] Short answer (a) I101 State the Biot

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please answer electromagnatic

1.[50 points] Short answer (a) I101 State the Biot-Savart law for a volume current density J Hs 4 (b) |101 What kind of current carrying structure produces an approximately uniform magnetic field? Please incl (c) 1 101 Find the charge density distribution given/-(r+) +22x)cocos(ar) dt ( y@hh3 sdney (d) |10] In the context of electromagnetics, explain the key characteristics of ferromagnetic materials which make them different from other materials. (e 110j Given vector potential A- (in cylindrical coords.), find the magnetic field H

Explanation / Answer

A ferromagnetic substance consist of permanent atomic magnetic dipoles that are oriented parallel to each another even in the absence of an external magnetic field. The magnetic repulsion between two dipoles aligned side by side with their magnetic moments in the same direction makes it difficult to understand the phenomenon of ferromagnetism. It is also known that within a ferromagnetic material, there is a spontaneous alignment of atoms in large clusters. A new type of interaction, a quantum mechanical effect known as the exchange interaction, is involved

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