Question

Magnetic field due to semi infinite wire

Answer 1

the magnitude of the field from a semi-infinite wire is half of that of an infinite wire ( see homework, or look at direct integration of the biot-savartlaw): in z direction. from the circular wire, the field is: the magnetic field from each section contribute in same direction (z)

Answer 2

The magnitude of the field from a semi-infinite wire is half of that of an infinite wire ( look at direct integration of the Biot-Savart law): in z direction. From the circular wire, the field is: The magnetic field from each section contributes in the same direction (z).