A battery is connected between two points `A and B` on the circumference of a uniform conducting ring of radius `r` and resistance `R` . One of the arcs `AB` of the ring subtends an angle `theta` at the centre . The value of the magnetic induction at the centre due to the current in the ring is

A battary 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 theta at the centre. Show that that the magnetic field at the centre of the coil is zero and independent theta .

A and B are two points on a circular ring made of uniform wire of resistane R. If the part AB of the ring subtends an angle theta at the centre C of the ring as shown below, find the resistance of the ring between the points A and B.

Find the centre of mass of a uniform semicircular ring of radius R and mass M .

Find the centre of mass of a uniform semicircular ring of radius R and mass M .

A circular arc of wire of radius of curvature r subtends an angle of p/4 radian at its centre. If i current is flowing in it then the magnetic induction at its centre is -

For a uniform ring of mass M and radius R at its centre

For a uniform ring of mass M and radius R at its centre

A thin conducting ring orf radius R is given a chareg +Q , Fig. The electric field at the centre O of the ring due to the charge on the part AKB of the ring is E . The electric field at the centre due to the charge on part ACDB of the ring is

A conducting ring of radius r and resistance R is placed in region of uniform time varying magnetic field B which is perpendicular to the plane of the ring. It the magnetic field is changing at a rate alpha , then the current induced in the ring is