A hollow cylinder having infinite length and carrying unifrom current per unit length `lamda` along the circumference as shown Magnetic field inside the cylinder is
.

Statement 1: A direct uniformly distributed current flows through a solid long metallic cylinder along its length. It produces magnetic field only outside the cylinder. Statement 2: A thin long cylindrical tube carrying uniformly distributed current along its length does not produce a magnetic field inside it. Moreover, a solid cylinder can be supposed to be made up of many thin cylinderical tubes.

Ampere's law | Magnetic field due to current carrying cylinder

The uniform current flowing through a thin hollow cylindrical conductor is I. What is the magnetic field inside the cylinder?

A current carrying wire AB of the length L is turned along a circle, as shown in figure. The magnetic field at the centre O.

A current carrying wire AB of the length L is turned along a circle, as shown in figure. The magnetic field at the centre O.

A current carrying wire AB of the length L is turned along a circle, as shown in figure. The magnetic field at the centre O.