Six long parallel current carrying wires are perpendicular to the plane of the fig. They pass through the vertices of a regular hexagon of side length a. All wires have same current I. Direction of current is out of the plane of the figure in all the wires except the one passing through vertex F, which has current directed into the plane of the figure. Calculate the magnetic induction field at the centre of the hexagon. Also tell the direction of the field.

Answer

`(mu_(0)I)/(pia)` towards midpoint of DE