Net magnetic field at the centre of the circle `O` due to a currying loop as shown in figure is `(thetalt180^(@))`
.

Net magnetic field at the centre of the circle O due to a current carrying loop as shown in figure is (thetalt180^(@)) .

Net magnetic field at the center of the circle o due to a current through loop ABC as shown in figure is ( theta lt 180^@)

The magnetic field at the centre of semicircle o in the figure is

The magnetic field at the centre of semicircle o in the figure is

The magnetic field at the centre of dotted circle in the arrangement shown is

The magnetic field at the centre of dotted circle in the arrangement shown is

The magnetic field at the centre O of the are shown in the figure is

Find the magnetic field at the centre of the circular loop shown in figure.