實驗七 電阻的溫度係數 Temperature Coefficient of Resistance

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Temperature Coefficient of Resistance. object . copper NTC negative temperature coefficient thermister - PowerPoint PPT Presentation

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  • Temperature Coefficient of Resistance

  • object

    copperNTCnegative temperature coefficientthermistercopperNTCnegative temperature coefficientthermister

  • theoryelectric conductorresistance value(1)free carriercrystal lattice(2)

  • metal conductormetal conductorfree electrondrift

  • R(T)R01TT0(1) R(T)TR0T0T0

  • (1)valence (2)metal ion

  • (3)T ..(2)

    R(T)T R0298.2 K25 T0298.2 K

  • (4)(2)ln

    ...............(3)

    YY0X ln

  • (5)50350 initial resistanceR0

  • (Kelvin double bridge)18RxVR (Rv)

  • Test0Rx Rx= Rv=

  • methodmultimeter

  • notes

  • ??

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