PHYSICS · Single correct · AP · Physics 2: Algebra-based · Magnetism and Electromagnetism · Magnetism and Electromagnetism
Problem
A wire is bent into a half-circle of radius 0.10m. Two straight radial segments connect the ends of the half-circle to its center, but the magnetic field at the center due to the radial segments can be ignored. A current of 5.0A flows through the wire. What is the magnitude of the magnetic field at the center of the half-circle? (Assume the permeability of free space has its standard value.)
(a) 3.1×10−5T
(b) 2.6×10−5T
(c) 1.6×10−5T
(d) 1.0×10−5T