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Electronic Devices question

2024 · 1 Feb · Shift 2 · Q76
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Electronic Devices question

2024 · 1 Feb · Shift 2 · Q76

JEE MainPhysicsElectronic DevicesMCQ+4 / −1
To measure the temperature coefficient of resistivity α\alphaα 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∘C25^{\circ} \mathrm{C}25∘C and resistance of the semiconductor arm is 3 mΩ3 \mathrm{~m} \Omega3 mΩ. Arm BC\mathrm{BC}BC is cooled at a constant rate of 2∘C/s2^{\circ} \mathrm{C} / \mathrm{s}2∘C/s. If the galvanometer G\mathrm{G}G shows no deflection after 10 s10 \mathrm{~s}10 s, then α\alphaα is : JEE Main 2024 (Online) 1st February Evening Shift Physics - Semiconductor Question 40 English
  1. A
    −1×10−2∘C−1-1 \times 10^{-2}{ }^{\circ} \mathrm{C}^{-1}−1×10−2∘C−1
  2. B
    −2×10−2∘C−1-2 \times 10^{-2}{ }^{\circ} \mathrm{C}^{-1}−2×10−2∘C−1
  3. C
    −2.5×10−2∘C−1-2.5 \times 10^{-2}{ }^{\circ} \mathrm{C}^{-1}−2.5×10−2∘C−1
  4. D
    −1.5×10−2∘C−1-1.5 \times 10^{-2}{ }^{\circ} \mathrm{C}^{-1}−1.5×10−2∘C−1
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