Two long thin parallel conductors C and D of the shape as shown in figure. Carry currents `I_1` and `I_2`. The separation between the conductors is a, the width of the right hand conductor is equal to b. Both the conductors are lying in one plane. Find the magnetic interaction force between them reduced to a unit length.

Two long, thin parallel conductors, separated by a distance d , carrying currents i_(1) and i_(2) . The force acting on unit length of any one conductor is F

A direct current I flows in a long straight conductor whose cross section has the form of a thin halr-ring of radius R. The same current flows in the opposite direction along a thin conductor located on the axis of the first conductor. Find the magnetic induction froce between the given conductors reduced to a unit of their length.

A direct current I flows in a long straight conductor whose cross section has the form of a thin halr-ring of radius R. The same current flows in the opposite direction along a thin conductor located on the axis of the first conductor. Find the magnetic induction froce between the given conductors reduced to a unit of their length.

Find the force on the conductor carrying current I_1 as shown in figure.

Two long straight parallel conductors of length l ,separated by a distance d and each carrying a current I attract each other with a force equal to

Shown in the figure is a conductor carrying a current i. the magnetic field at the origin is :