question_answer

AB is current-carrying conductor in the plane of the paper as shown in figure. What are the directions of magnetic fields produced by it at the points P and O? If r1 > r2, where will the strength of the magnetic field be larger?  

Answer:

Applying right-hand thumb rule, the direction of magnetic field produced by a current-carrying conductor at Point P into the plane of paper Point Q out of the plane of paper                            (1 x 2) As magnetic field is inversely proportional to distance, the field at Q will be larger than the field at .                                                                              (1)