A current flows in a long straight wire with cross section

Last updated: 6/25/2023

A current flows in a long straight wire with cross section having the form of a thin quarter ring of radius R see figure The magnetic field B at point O if the current flows out of the page is L 1 Hol R R 1 1 3 i 1 Hol T 2R 2 1 Mol T R 4 Hol T R 1 1