Which of the following is the expression for the Ampere's Circuital Law?

∫B.dl = 2μοI ∫B.dS = μοI ∫B.dS = 2μοI ∫B.dl = μοI

∫B.dl = μοI

The mathematical expression for the Ampere's Circuital Law : ∫B.dl = μοI