A thin but long, hollow, cylindrical tube of radius r carries a current i along its length. Find the magnitude of the magnetic field at a distance r/2 from the surface (a) inside the tube (b) outside the tube.

A long, cylindrical tube of inner and outer radii a and b carries a current i distributed uniformly over its cross section. Find the magnitude of the magnetic field at a point (a) just inside the tube (b) just outside the tube.

A long, cylindrical wire of radius b carries a current i distributed uniformly over its cross section. Find the magnitude of the magnetic field at a point inside the wire at a distance a from the axis.

A long, straight wire of radius R carries a current distributed uniformly over its cross section. The magnitude of the magnetic field is

A cylindrical long wire of radius R carries a current I uniformly distributed over the cross sectionasl area of the wire. The magnetic field at a distasnce x from the surface inside the wire is

A currents I flows along a long, thin-walled tube of radius R with a long longitudinal slit of width h. Find the induction of the magnetic field at a distance r lt R from the axis of the tube under the condition h lt lt R .

An infinitely long hollow coducting cylinder with inner radius R/2 and outer radus R carries a uniform current density along its length. The magnitude of the magnetic field |B| as a function of the radial distance r from the axis is best represented by

A long, thick straight conductor of radius R carries current I uniformly distributed in its cross section area.The ratio of energy density of the magnetic field at distance R//2 from surface inside the conductor and outside the conductor is:

A hollow tube is carrying an electric current along its length distributed uniformly over its surface. The magnetic field

A long straight solid metal wire of radius R carries a current I, uniformly distributed over its circular cross-section. Find the magnetic field at a distance r from axis of wire (i) inside and (ii) outside the wire.

A long copper tube of inner radius R carriers a current i . The magnetic field B inside the tube is