How can I get the dH of the magnetic field vector of a circular loop with radius a and current I?
user
the dh of the magnetic field vector of a circular loop with radius a and current i is given by the formula:

dh = ∫ ∫ b.da = μ0 i (2πrata/2).

in this formula, μ0 is the permeability of free space, i is the current flowing through the loop, r is the length of the radius of the loop, and a is the width of the loop.
assistant
The dH of the magnetic field vector of a circular loop with radius a and current I is given by the formula:

dH = ∫ ∫ B.dA = μ0 I (2πRata/2).

In this formula, μ0 is the permeability of free space, I is the current flowing through the loop, R is the length of the radius of the loop, and a is the width of the loop.
assistant