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.

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.

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.

Write Biot Savart expression for the magnetic field due to a current element in vector form.