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Expalin Biot Savart's Law.

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The Biot Savart Law is used to determine the magnetic field intensity B near a current carrying conductor in terms of magnetic field intensity generated by its source current element.

Consider a wire carrying an electric current I and also consider an infinitely small length of a wire dl at a distance r from point A.

Biot Savart  Law states that magnetic intensity dB at a point A due to current I flowing through a small element dl is

a) Directly proportional to current (I)

b) Directly proportional to the length of the element (dl)

c) Directly proportional to the sine of angle θ between the direction of current and the line joining the element dl from point A.

d) Inversely proportional to the square of the distance (x) of point A from the element dl.

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