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Q.

State and explain Biot savart law.

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Detailed Solution

The magnetic induction field strength at a point due to a current carrying element is
Question Image
directly proportional to current 'i' dBαi(1)
directly proportional to length of the element  'dl. i.e dBαdl(2)
directly proportional to sine of angle between the current carrying element and the line joining the mid point of element
dBαsinθ(3)
and is inversely proportional to the square of the distance between the point and element
dBα1r2(4)dBαidlsinθr2dB=μ04π¯idlsinθr2

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