Question

state biot savart law used to field magnetic field due to (1) infinite conductor (2) circular coil on its axis

Answer 1

The bio savart law states that if we have a differential current element (I.dl) then it will produce a magnetic field around it which is directly proportional to the magnetic current, the length of the current element, the sine of the angle between the current element and the line joining the current element to the point in consideration and is inversely proportional to the square of distance between the current element and the point in consideration.

There is proportional constant = 1/4$\pi$

dH = \frac{I. dl. sin\alpha }{4\pi r^{2} }[/tex]

2) Biosavart law for circular coil on its axis is

$H = \frac{I}{4\pi r} az$

H is magnetic field intensity,

I current

r is distance

az is perpendicular direction