Derive an expression for magnetic field strength B at a point P due to current flowing through a straight conductor using Biot Savart's law.

The magnetic field at the origin due to the current flowing in the wire is

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.

Using Ampere's circuital law, obtain an expression for the magnetic induction at a point near an infinitely long straight conductor carrying an electric current.

Using Biot-Savart’s law, derive an expression for magnetic field at any point on axial line of a current carrying circular loop. Hence, find magnitude of magnetic field intensity at the centre of circular coil.

Find the magnetic field induction (in magnitude and direction) at a point due to current flowing in a long straight conductor. Show the sketch of magnetic field produced.

Magnetic field at point O due to straight conductor PQ is

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

State the rule that is used to find the direction of magnetic field acting at a point near a current carrying straight conductor.