alleryAmpere's law states the line integral of B around a closed loop equals:
Aμ₀ × current enclosed
Bμ₀ × I × dl
Cμ₀ × charge
Dμ₀ × E
Answer & Solution
Correct answer: A. μ₀ × current enclosed
**Ampere's law:** ∮ B · dl = μ₀ I_enclosed.
The line integral of B around a closed Amperean loop equals μ₀ times the net current passing through the loop.
Used to derive B due to long wire, solenoid, toroid.
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