Ampere's law and Biot-Savart law

• Ampere showed that if a continuous closed line or loop can be drawn round the current carrying conductors or conductor  and B is the magnetic induction in the direction of an element dl of the loop, then line integral of  B.dl=Uoi
• Biot-Savart law is applied for the curved current carrying conductor, on the other hand Ampere's law is applied for the uniform current carrying conductor.