PHY 2049 Midterm: University of Florida PHY 2049 Exam2_solutions-1
Document Summary
9 exam #2 solutions fall 2012: the diagrams show three circu circles of radii r, 2r, and 3r) and r them according to the magnitudes rcuits consisting of concentric circular arcs (either d radial segments. The circuits carry the same cur des of the magnetic fields they produce at c, least er half or quarter current. Magnetic field at the center to consider arcs. pointing out of. "t produce magnetic field at c so we only need to c clock wise and the magnetic field to be positive po ter from an arc of radius r is (cid:8)(cid:9)(cid:10) (cid:12)(cid:13)(cid:14) so we have. 4(cid:19)(cid:1)3(cid:21)(cid:4) (cid:22) (cid:16)(cid:17)(cid:18)(cid:19) (cid:16)(cid:17)(cid:18) (cid:1)1(cid:4) (cid:6) (cid:7) (cid:16)(cid:17)(cid:18)(cid:19) 4(cid:19)(cid:1)3(cid:21)(cid:4) (cid:23) (cid:16)(cid:17)(cid:18)(cid:19) (cid:1)2(cid:4) (cid:6) (cid:7) (cid:16)(cid:17)(cid:18)(cid:19) (cid:16)(cid:17)(cid:18) 4(cid:19)(cid:1)2(cid:21)(cid:4) (cid:7) (cid:23) 5 (cid:16)(cid:17)(cid:18)(cid:19) (cid:1)3(cid:4) (cid:6) (cid:7) Magnetic field from an infinite lo long straight current-carrying wire is (cid:8)(cid:9)(cid:10) wire. (cid:27)(cid:13)(cid:28) at a dist istance r from: two parallel long wires carry length.
