A Zero B HORJ C HORJ D 3 4 HORJ 2R 31 The diagram above

Last updated: 6/9/2023

A Zero B HORJ C HORJ D 3 4 HORJ 2R 31 The diagram above shows the cross section of a long cable that has an inner wire of radius R surrounded by a conducting sheath of outer radius 2R The wire and the sheath carry currents in opposite directions but with the same uniform current density J What is the magnitude of the magnetic field at the surface of the outer conductor E RJ X X X