PQ is a cwrent carrying conductor in the plane of the paper as shown in the fig. Mention the direction of magnetic fields produced by it at points A and B.

Given : `r_(1) lt r_(2r)` ,where will the strength of the magnetic field be larger ? Justify your answer in each case.

Explanation

Strength of magnetic field will be larger at A as the strength of magnetic field decreases when the distance is increased direction of magnetic field lines at A as well as B is anticlockwise because field lines are concentric circles and direction is determined by Right hand thumb rule.