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ss_5 - Problem Set 5 13-344 Fall 2004 Due Tuesday 12...

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Unformatted text preview: Problem Set 5 13-344 Fall, 2004' Due Tuesday, 12 September at Romm B-010 In the following multiple~choice questions, indicate the single and best answer. 1. The electrical resistivity of a metal: a) is much lower than that of a semiconductor like silicon; b) is inversely proportional to conductivity; 0) increases with increasing temperature; d) almost always increases when alloying elements are added to the metal; (c) all of the above. 2. The electrical resistivity of a metal increases with increasing temperature, because: a) the conduction band is empty; 8 acceptor levels become filled and holes appear in the valence band; c the vibration amplitude of the metal atoms increase and the probability that a conduction electron will scatter from a metal atom increases; "(1) the metal becomes superconducting; ' = . e), none of the above. v 2&3 YALE m ‘1 “news a“ Walk) CalW‘SRM‘S WT) -» . x __ e. \‘7, \S» \D . 00 '* 0.001 ’4' 7b Q} .21 _ i swam-r easeme- 4 Hz, (\mxm \olw MWMW __J..'..i.. mm 09 '~ - 'UD‘HKZ' Lemar. Wed (at =3==\:..n., avg ""C a F3 .' E. j ‘l- Ce w «w m “mm-u x> w, M W. .‘A ‘ 5 3" ‘ ' xvi car 6 “C W W \‘5 Nr Q‘ODM A "' L“. ‘4 7 ‘3 ‘70 ‘1. .',- ‘- (cm “I, W \ >4; Wk no N ‘tabu‘b. {Thad *v Cousmo TU“ "‘ *2 '-._ ,--' ‘ \%\\M\ W $2me \3 Cow-356m H \IQ\\\\7 “Us VALET. wt C m mg} HA 1... ‘1’ Cae‘bLI—hvm M; W. Waco! \ Y— - - Coxfix Ck Um EC? ‘- 1153 AS M595, .1 \5 ~ cw Lu“ W “.7” (‘8 x u. v; 1 [email protected] VD \ Wmmwz Low - E _G Beast“ "2 - M358 ‘* Om r- woka W k- W» any mm ex aw w>w team M" US— WLE‘ \)\ _ $0 \fi.‘ ‘,.,._~ E b \u we» - w Lb 3 k...) N FLDCA RM [A 's g”: _;. 1’ {mad ( n L :— %.K X \D‘ - M v L g ._ Q 2 n“ L ‘ _. A ’ m ca$ " vOLUWZ-' E ‘W ': 5 L ‘TN "a 13> I .1: M “:8 I _ ‘__ I b " bfio‘: { u :3) g \ .. I . Ad .0 MM W. ‘° ° ' = III—nu. w 3. bzg‘vm m ¥e~cr W m Mg k WM. S'tSmV‘W “I \JJ‘QN 3:" Wk L \ \L) -G}i?%\xfi. ‘S mum MWL 0k) 4 {AG-b I \B A: S‘aw. _ v ‘w t \fii mom; N \mw; \S WT T 2- 3* '- ' PR\\.\X€£ At 3 _ ' . E. "at \ Z; “0 7 mead ...
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