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near relationship between resistivity and tem mperature range? Why is the equation not va onductor, current is carried by holes. The cur

near relationship between resistivity and tem mperature range? Why is the equation not va onductor, current is carried by holes. The cur

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Answer any of three
(a) What is the expected value of mean free time in a superconductor with zero resistivity? Justify your answer. (b) The linear relationship between resistivity and temperature, p = AT + B, is valid for which temperature range? Why is the equation not valid outside this temperature range? (c) In a conductor, current is carried by holes. The current density is along +y direction and the magnetic field is applied along +x direction. Determine the direction of the Hall field.
Transcribed Image Text:(a) What is the expected value of mean free time in a superconductor with zero resistivity? Justify your answer. (b) The linear relationship between resistivity and temperature, p = AT + B, is valid for which temperature range? Why is the equation not valid outside this temperature range? (c) In a conductor, current is carried by holes. The current density is along +y direction and the magnetic field is applied along +x direction. Determine the direction of the Hall field.
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