Current Electricity and Electrical InstrumentHard
Question
The temperature (T) dependence of resistivity (ρ) of a semi-conductor is represented by:
Options
A.
B.
C.
D.
Solution
Ina semiconductor when temperature increases conductivity increases so resistivitydecreases i.e.
T ∝
ρT = constant ⇒ ρ = K
dρ = - K
dT ⇒ 
= - 
So, slope of ρ - T cure is negative & it is dependent upon T i.e.it is not contest So, aliernative (c) is right choice.
T ∝
ρT = constant ⇒ ρ = K
dρ = - K
dT ⇒ = - So, slope of ρ - T cure is negative & it is dependent upon T i.e.it is not contest So, aliernative (c) is right choice.
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