ampere's law

Question

Line integral of B·dl around closed path equals μ_0 times:

RankGuru · Accepted Answer

**Ampere's Circuital Law** states that the line integral of magnetic field $\vec{B}$ around any closed loop (called an Amperian loop) is equal to $\mu_0$ times the total steady current $I$ passing through the surface enclosed by the loop.
$\oint \vec{B} \cdot d\vec{l} = \mu_0 I_{enclosed}$
This law is particularly useful for calculating magnetic fields of symmetric distributions like long wires, solenoids, and toroids.

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Ampere's law integral form states ∮ B·dl equals?