What is the relation between magnetic field (B), current (I) and distance (r) in case of a straight current-carrying conductor?

The graph showing the variation of the magnetic field strength (B) with distance (r) from a long current carrying conductor is.

The magnetic field in a straight current carrying conductor wire is:

The magnetic field in a straight current carrying conductor wire is:

What is the action of a magnetic field on a current carrying conductor?

What is the form of magnetic field lines due to a straight current-carrying conductor?

Write down the eqution for the magnetic field induction (B) at a distance (S) from a long straight conductor carrying current I.