PHYS 241 Study Guide - Final Guide: Power Factor

• School: University of Arizona
• Department: Physics
• Course: PHYS 241
• Professor: Sandhu

Document Summary

Torque on dipole = d neg to pos p = q . 4 x 2 0 x i. F pt chg in uniform fld = q . Conductors: charge moves to the surface always, e inside=0. Pavg =vrms irms cos( ) cos( ) = power factor. 2 x d! l r r2 length. 2 r ; linduct = 0 n2 vvolume (if rcoil << rtorus) Incr temp: conductors conduct worse b/c electrons moving but semiconductors better (b/c more electrons free at incr temp) Lenz"s law: an induced current always opposes the change in magnetic flux. 4 0 dq dt r; presistor = i2 r.