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

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

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

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

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

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

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 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 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.