Two long wires carrying current `I_1 and I_2` are arranged as shown in figure. The one carrying current` I_1` is along the x-axis. The other carrying current `I_2 `is along a line parallel to the y-axis given by x=0 and z=d. Find the force exerted at `O_2` because of the wire along the x-axis.

A stragiht conductor carrying current I_1 is passed along the axis of a circular conductor carrying current I_2 . With what fore are the currents interacting?

A wire loop is formed by joining two semicircular wires of radii r_1 and r_2 as shown in the figure . The loop carries a current I, find the magnetic field at the centre O.

A wire loop carrying a current I is placed in the xy-plane as shown in figure If an external uniform magnetic induction field B=Bhati is applied, find the force acting on the loop due to this field.

A metallic wire carrying a current I is bent into the form as shown in the figure. The circular portion ABC of the wire is of radius r and the straight portion AC subtends an angle 2theta at the centre O. Find the magnetic field due to the conductor at point O. If the radius of the curved path is r, find the magnetic field at the centre O.

Determine the values of currents I_1, I_2 and I_3 in the network shown in the figure.

Two insulating infinitely long wires are lying mutually perpendicular to each other as shown in the figure. If the two wires carry currenst I_1 and I_2 as shown in the figure, find the magnetic field at point P (A,b).

Two long straight wires carrying the same current 1 and separated by a distance r exert fore F per unit length on each other. If the current is increased to 2 I and separation is reduced r/2, then force will become

Two semi infinitely long straight current carrying conductors are held in the form as shown in figure. One common end of them is at the origin. If both the conductors carry same current I, find the value of the magnetic field induction at a point (a, b).

A wire carrying current I and other carrying 2I in the sam direction produce a magnetic field B at the midpoint. What will be the field when 2I wire is swiched off?

In the diagram below is shown a circular loop carrying current I. show that the direction of magnetic field with the help of lines of force.