The magnetic field at the point of intersection of diagonals of a square wire loop of side L, carrying a current I is

Find the magnetic field at the point of intersection of the diagonals of a square having sides a and carrying current I.

Magnetic field at the centre of coil of n turns, bent in the form of a square of side 2l , carrying current i , is

The magnetic field at the centre of an equilateral triangular loop of side 2L and carrying a current i is

The magnetic field at the centre of an equilateral triangular loop of side 2L and carrying a current i is

Magnetic field induction at athe cetre O of a square loop of side a carrying current I as shown in figure is

Magnetic field induction at the centre O of a square loop of side a carrying current I as shown in figure.