A direct current `I=10A` flows in a long straight round conductor. Find the magnetic flux through a half of the wire's cross-section per one meter of its length.

A direct current I = 10 A a flows in a long straight round conductor. Find the magnetic flux through a half of wire's cross-section per one meter of its 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.

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 current I flows in a long straight wire (into the plane of the paper) with cross-section having the from of a circular are of radius R a shown in the figure. Find the magnetic induction at the point O .

A current I flows in a long straight wire (into the plane of the paper) with cross-section having the from of a circular are of radius R a shown in the figure. Find the magnetic induction at the point O .

A current i is flowing in a straight conductor of length L. The magnetic induction at a point distant L/4 from its centre will be-

A current i is flowing in a straight conductor of length L. The magnetic induction at a point distant L/4 from its centre will be-

A current i is flowing in a straight conductor of length L. The magnetic induction at a point distant L/4 from its centre will be-