To measure the temperature coefficient of resistivity \alpha of a semiconductor, an electrical arrangement shown in the figure is prepared. The arm BC is made up of the semiconductor. The experiment is being conducted at 25^{\circ} {\C} and resistance of the semiconductor arm is 3 {\m} Ω. Arm BC is cooled at a constant rate of 2^{\circ} {\C} \/ { s}. If the galvanometer {\G} shows no deflection after 10 { s}, then \alpha is : [1-Feb-2024 Shift 2]

Correct Answer is : −1×10−2∘C−1

-2 \times 10^{-2}{ }^{\circ} {\C}^{-1}

-1.5 \times 10^{-2}{ }^{\circ} {\C}^{-1}

-1 \times 10^{-2}{ }^{\circ} {\C}^{-1}

-2.5 \times 10^{-2}{ }^{\circ} {\C}^{-1}

Semiconductor Electronics Part 2

Section: Physics

Question : 6 of 100

Marks: +1, -0

To measure the temperature coefficient of resistivity α of a semiconductor, an electrical arrangement shown in the figure is prepared. The arm BC is made up of the semiconductor. The experiment is being conducted at 25∘C and resistance of the semiconductor arm is 3mΩ. Arm BC is cooled at a constant rate of 2∘C∕ s. If the galvanometer G shows no deflection after 10 s, then α is :

[1-Feb-2024 Shift 2]

−2×10−2‌∘C−1
−1.5×10−2‌∘C−1
−1×10−2‌∘C−1
−2.5×10−2‌∘C−1

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