With the help of a necessary diagram, derive an expression for magnetic field due to straight current carrying conductor at any point.

Derive an expression for the magnetic field.at the centre of a current carrying coil.

Derive an expression for magnetic field at the centre of circular current carrying coil.

Using Biot Savart’s law derive an expression for the magnetic field due to a circular current carrying loop at any point on its axis.

State Ampere's circuital law. By using it derive an expression for magnetic field intensity at a point due to a straight current carrying conductor.

The magnetic field at a point due to a current carrying conductor is directly proportional to