Question

Sketch the magnetic field lines of a straight current carrying conductor .

Answer 1

The magnetic field lines around a straight conductor carrying current are concentric circles whose centre lie on the wire. When current in the wire flows in the upward direction, then the lines of magnetic field are in the anticlockwise direction.

Answer 2

let straight current carrying conductor be in the plane of paper.So magnetic field lines would be along concentric circles going perpendicular to the plane of paper

Now

let straight current carrying conductor be perpendicular to plane of paper.
so it's magnetic field lines would be on the plane of paper in concentric circles

see attachment