Is 2D version of Biot-Savart equation is used, when the sources

is-2d-version-of-biot-savart-equation-is-used-when-the-sources

Is 2D version of Biot-Savart equation is used, when the sources are invariant in one direction?
A. True
B. False
Right answer is A. True

The 2D version of the biot-savart equation is used when the sources are invariant in one direction.in general the current need not flow only in a plane normal to the invariant direction and it is given by the formulations given above work well when the current can be approximated as running through an infinitely-narrow wire.