Describe the Bio-Savart law?

Physics.chapter 3rd

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  • the formula helps you to remember its description
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  • u0. I dl sin theta/ 4πr^2 = dB
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  • Biot Savart  Law states that
    The magnetic intensity dH at a point A due to current I flowing through a small element dl is
    1)Directly proportional to current (I)
    2)Directly proportional to the length of the element (dl)
    3)Directly proportional to the sine of angle θ between the direction of current and the line joining the element dl from point A.
    4)Inversely proportional to the square of the distance (x) of point A from the element dl.

    where k is constant and depends on the magnetic properties of the medium.

    µ0 = absolute permeability of air or vacuum and its value is 4 x 10-7 Wb/A-m
    µr= relative permeability of the medium.
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  • Electromagnetic force comprises of electric and magnetic fields. Charges that aren't moving produce electric fields. But when those charges do move, they instead create magnetic fields. For example, a magnet is only a magnet because of moving charges inside it. And charges moving in an electric wire also produce magnetic fields. If you move a compass near to an electric wire, you'll find that the compass needle changes direction. The Biot-Savart Law is an equation that describes the magnetic field created by a current-carrying wire, and allows you to calculate its strength at various points. The Biot–Savart law is fundamental to magnetostatics, playing a role similar to that of Coulomb's law in electrostatics. The direction of the magnetic field contribution follows the right hand thumb rule. There are many applications of Biot-Savart's law like it is used to calculate magnetic field in selenoid, toroid etc. and we know that, there selenoids and toroids are used for various applications in real-life equipments.
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  • biot savart law deals with the magnetic field due to small current carrying elements it's a valid only for symmetrical current distribution it's applicable to very small length conductors carrying current.its obeys in verse square law it is analogue of coloumbs law in magnetism
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  • biot savart's law deals with the magnetic field due to small current carrying elements its a valid only for symmetrical current distributions its applicable to very small length conductors carrying current .... it obeys inverse square law. it is analogue of coloumb's law in magnetism
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