An infinite straigh conductor carrying current 2 I is split into a loop of radius r as shown in fig. the magnetic field at the centre of the coil is

A part of a long wire carrying a current i is bent into a circle of radius r as shown in figure. The net magnetic field at the centre O of the circular loop is :

A part of a long wire carrying a current i is bent into a circle of radius r as shown in figure. The net magnetic field at the centre O of the circular loop is

A part of a long wire carrying a current i is bent into a circle of radius r as shown in figure. The net magnetic field at the centre O of the circular loop is

A long straight conductor carrying a current i is bent to form an almost complete circular loop of radius r on it. The magnetic field at the centre of the loop

A square loop of side a carris a current I . The magnetic field at the centre of the loop is

A square loop of side a carris a current I . The magnetic field at the centre of the loop is

A circular loop and an infinitely long straight conductor carry equal currents, as shown in the figure . The net magnetic field at the centre of the loop is B_(1) when the current in the loop is clockwise and B_(2) when the current in the loop is anti - clockwise . Then (B_(1))/(B_(2)) is

A conductor of length L and carrying current i is bent to form a coil of two turns.Magnetic field at the centre of the coil will be

An infinite straight current carrying conductor is bent into a circle as shown in the figure . If the radius of the circle is R , the magnetic field at the centre of the coil is :