according 2 biot & savarts law..........

d magnitude of d magnetic induction (dB) at a point due 2 an element is directly proportional to I,dl,& sin @

...and inversely proportional 2 r^2

 

dB= (K I dl sin @)/r^2

 

K is d non zero constant of proportionality

K depends on d medium ..........& system of units

hope u r clear..

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