[" An arc of a circle of radius "R" subtends an angle "],[pi/2" at the centre.It carries a current i.The "],[" magnetic field at the centre will be "]

An arc of a circle of raduis R subtends an angle (pi)/2 at the centre. It carriers a current i . The magnetic field at the centre will be

An arc of a circle of raduis R subtends an angle (pi)/2 at the centre. It carriers a current i . The magnetic field at the centre will be

A circular coil of n turns and radius r carries a current I. The magnetic field at the centre is

A current i ampere flows in a circular arc of wire whose radius is R , which subtend an angle 3pi//2 radian at its centre. The magnetic induction B at the centre is

A current i ampere flows in a circular arc of wire whose radius is R , which subtend an angle 3pi//2 radian at its centre. The magnetic induction B at the centre is