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I am struggling to work out out whether the conductance will increase or decrease with an increase in temperature. This I know sounds so basic yet i can't grasp something. I know that resistance increases with temperature so I would assume that conductivity will decrease. However a formula I have doesn't show this trend. below is the equation in question;

[tex] \sigma ^' = \frac {\sigma} {1+ \alpha \delta T} [/tex]

{my latex command wouldn't work so deleted the tex command to show the equation}

where

[tex] \delta{T}=T-T^{'}[/tex]

[tex] \sigma^{'}= [/tex] conductivity at common temperature = 293K

[tex] \sigma= [/tex] the conductivity at the measured temperature

T^{'}= the common temperature

T=Measured Temperature

which will then mean that;

[tex] \sigma= \sigma^{'}\beta [/tex]

where

[tex] \beta =1+\alpha \delta{T} [/tex]

which says that the conductivity will increase with temperature, from what I understand this doesn't make sense to me!!!

Please Help :surprised

Thanks

n

[tex] \sigma ^' = \frac {\sigma} {1+ \alpha \delta T} [/tex]

{my latex command wouldn't work so deleted the tex command to show the equation}

where

[tex] \delta{T}=T-T^{'}[/tex]

[tex] \sigma^{'}= [/tex] conductivity at common temperature = 293K

[tex] \sigma= [/tex] the conductivity at the measured temperature

T^{'}= the common temperature

T=Measured Temperature

which will then mean that;

[tex] \sigma= \sigma^{'}\beta [/tex]

where

[tex] \beta =1+\alpha \delta{T} [/tex]

which says that the conductivity will increase with temperature, from what I understand this doesn't make sense to me!!!

Please Help :surprised

Thanks

n

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