A wire carrying current I is shaped as shown in the figure. The section AB is quarter circle of radius r. The magnetic field is directed .

Options

A. At any angle `pi//4` to the plane of the paper.
B. Along the bisector of the angle ACB towards AB .
C. Along the bisector of the angle ACB away from AB.
D. Perpendicular to the plane of paper in downward direction.

Answer

D

Explanation

we know that as the current in the loop flows in clockwise direction, therefore magnetic field due to current at the centre of the loop will be perpendicular to the plane of the paper in the downward direction .