Statement - 1: The temperature dependence of resistance is usually given as R=R_0(1+\alpha ∆ t). The resistance of wire changes from 100 Ω to 150 Ω when its temperature is increased from 27^{\circ} {\C} to 227^{\circ} {\C}. This implies that \alpha=2.5 \times 10^{-3} \/ C. Statement - 2: R=R_0(1+\alpha ∆ t) is valid only when the change in the temperature ∆ T is small and ∆ T= (R-R_0) < < R_0. [AIEEE 2009]

Correct Answer is : Statement −1 is false, Statement −2 is true

Statement -1 is true, Statement -2 is true; Statement - 2 is the correct explanation of Statement - 1

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

Statement -1 is false, Statement -2 is true

Statement -1 is true, Statement - 2 is false

Thermodynamics Part 1

Section: Physics

Question : 65 of 100

Marks: +1, -0

Statement - 1: The temperature dependence of resistance is usually given as R=R0(1+α∆t). The resistance of wire changes from 100Ω to 150Ω when its temperature is increased from 27∘C to 227∘C. This implies that α=2.5×10−3∕C.
Statement - 2: R=R0(1+α∆t) is valid only when the change in the temperature ∆T is small and ∆T=(R−R0)<<R0.

[AIEEE 2009]

Statement −1 is true, Statement −2 is true; Statement - 2 is the correct explanation of Statement - 1
Statement - 1 is true, Statement - 2 is true; Statement - 2 is not the correct explanation of Statement - 1
Statement −1 is false, Statement −2 is true
Statement −1 is true, Statement - 2 is false

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