Biot–Savart law gives the magnetic field dB due to a current element I…

Question

Biot–Savart law gives the magnetic field dB due to a current element I dl as

Accepted Answer

A. dB ∝ I dl × r̂ / r²

dB = (μ₀/4π) · I dl × r̂ / r².
The direction follows the right-hand rule via the cross product.

Answer

dB ∝ I² dl / r

Answer

dB ∝ dl / I

Answer

dB ∝ I dl · r̂

Biot–Savart law gives the magnetic field dB due to a current element I dl as