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gg ^ll3a ellOlul =at resistance)9 =g + 914. zllel A rJ€ g HI g lLE "rl 7ll= 9€-e E-gt4r E+ "ll olg 44 u -E u (four point "Ii-lle+ ,JEI. Rs-E Ezl I = E zl aJS e "J€ B( r ) zl olg- "JaIq, n zlo};le nRsTI €tr}. (el= =q q€ z|-tr9 e"J€ 10 Rs = 1009/n ol4E d;l zlolg nRs = 10004 ). E^l probe)E +e6}q E zlolql rll+ d+' dg' +Zl4g Rr: msf +, 649 ++ A +q "J frs.a}+. o q+4 E +4171 44 if, _ tr rr E u -e tJ ,J4ql @ rlyJ g ? olpi *ol E _ aF zI4 H+ € d z) Els]] Ell+61 Sg z) z) -L w -T- r= 3-5 4E --=.tr q E ge ql^'l 4"-i"l t"J 6}2l € d I -z -o s alt+trI. E zl oJ<19 g 4+ ulzla] o3 +g ^l p = Rs x +4) (p = Rs . t) ......... (3-7) ^lrJE +4)71 E-tr-E 'J4n-q €d +4+ 4+, 44 E_trEg d+.d"J+ ul zla}el +41= u}9+ ,Jvl. p = 2"s+ (3-8) € zl r-l S= sg E zJ4 ol4. (3-6)