Neglecting air friction effects, what path does the

Week 7 Thursday, October 6, 2016 11:07 AM • Nichrome wire from last week melted and recast w 2x original length. Find Rn as multiple of old resistance Ro Suppose electrical wire replaced w one having every linear dimension doubled  With higher T, atoms vibrate leading to thermal scattering of electrons  Electrons find it more diff to pass thru atoms bc of more collisionsw atoms  Increased e- scattering w inc T= inc R  For most metals, R inc approx linearly w T over limited T range    Ex) platinum resistance thermometer-measures T by measuring change in resistance of conductor ○ Principle of thermometer measured by resistance formula above ○ When device is immersed in vessel containing melti