Question

find magnetic field at the center of current carrying circular wire draw magnetic field lines also

Answer 1

*MAGNETIC FIELD DUE TO A CURRENT CARRYING CIRCULAR COIL*.
◇Magnetic field at the centre is uniform.
◇ The direction of magnetic field at the centre is perpendicular to the plane of the coil.
◇ Magnetic field is maximum at the centre of the coil.
And magnetic field lines are directed from North to South pole on the outside and South to North pole on the inside.