Question

phym316 mc 139%. question 4 (25 marks) Consider a metal bar with square cross-section that is 10 cm long and 1 cm wide. A potential difference of 250 V is applied across its ends. It has a resistivity of 10-8 2m and electron density of 6 x 10sm-3 (a) Calculate the relaxation time, T. (b) Calculate the shift in the Fermi surface due to the applied voltage. [51 15] (d) What is the thermal conductivity at room temperature (300 K)?. (c) What fraction of kp is this? (e) If a magnetic field of I T is applied perpendicular to the bar, what will the hall voltage be? Page 3 of 3 Pages

please help step by step

Answer 1

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please once cross calculation.i am really sorry for part d .thank you