Question

what is the realtion between magnetic field(B) , current (I), and distance (r) in case of a staright current carrying conductor ​

Answer 1

Answer:

Magnetic field due to an infinitely long straight current carrying wire - definition. B=(2πr)μ0I where B is the magnitude of magnetic field, r is the distance from the wire where the magnetic field is calculated, and I is the applied current.

Explanation:

Answer 2

Answer:

Magnetic field strength is inversely proportional to the distance from the wire i.e. \begin{align*}B \propto \frac{1}{r}\end{align*}, greater the distance from the current carrying conductor, weaker will be the magnetic field.