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Statement-1:- The temperature dependence...

Statement-1:- The temperature dependence of resistance is usually given as `R=R_(0)(1+alpha Deltat)`. The resistance of a wire changes from `100Omega` to `150Omega` when its temperature is increased from `27^(@)C` to `227^(@)C`. This implies that `alpha=2.5xx10^(-3)//""^(@)C`
Statement- 2 :- `R=R_(0)(1+alpha Deltat)`  is valid only when the change in the temperature `DeltaT` is small and `DeltaR=(R-R_(0))lt lt R_(0)` 

A

Statement-1 is true, statement-2 is true, Statement-2 is the correct explanation of statement-1.

B

Statement-1 is true, statement-2 is true, Statement-2 is not the correct explanation of statement-1.

C

Statement-1 is false, Statement-2 is true

D

Statement-1 is true, Statement-2 is false

Text Solution

Verified by Experts

The correct Answer is:
D
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