Two concentric loops of radii 30cm and 50cm carrying equal currents i =7A in opposite directions are kept in xy plane as shown in figure. Find net magnetic moment of system.

An otherwise infinite, straight wire has two concentric loops of radii a and b carrying equal currents in opposite directions as shown in Fig. The magnetic field at the common centre is zero for

A square loop of side l carries a current i. it is placed as shown in figure. Find the magnetic moment of the loop.

A square loop OABCO of side of side l carries a current i . It is placed as shown in figure. Find the magnetic moment of loop.

Two small circular loops, marked (1) and (2), carrying equal currents are placed with the geometrical axes perpendicular to each other as shown in figure. Find the magnitude and direction of the net magnetic field produced at the point O.

Two parallel wires C and D placed perpendicular to the plane of paper at a separation of r(=8cm) , carry electric currents I_1=6A and I_2=3A in opposite directions as shown in figure. Find the point on the line CD where the resultant magnetic field is zero.

Two circular concentric loops of radii r_(1)=20cm, r_(2)=30 cm are placed in the X-Y plane as shown in the figure. A current I= 7 A is flowing through them. The magnetic moment of this loop system is

Find net force on the equilateral loop of side m carrying a current of 2 A kept in a uniform magnetic field of 2 T as shown in figure.

A part of a long wire carrying a current i is bent into a circle of radius r as shown in figure. The net magnetic field at the centre O of the circular loop is

The figure shows the cross section of two long coaxial tubes carrying equal current I in opposites directions. If B_1 and B_2 are magnetic fields at point 1 and 2 as shown in figure then