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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A battery is connected between two points A and B on the circumference of a uniform conducting ring of radius r and resistance R as shown in Fig. One of the arcs AB of the ring subtends angle θ at the centre. Show that that the magnetic field at the centre of the coil is zero and independent θ.

A battery is connected between two points A and B on the circumference of a uniform conducting ring of radius r and resistance R as shown in Fig. One of the arcs AB of the ring subtends angle θ at the centre. Show that that the magnetic field at the centre of the coil is zero and independent θ.

Shown in figure is a conductor carrying current I. Find the magnetic field intensity at point O.