Maurice Tutor

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About Maurice Tutor

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Algebra,Applied Sciences,Biology,Calculus,Chemistry,Economics,English,Essay writing,Geography,Geology,Health & Medical,Physics,Science Hide all
Teaching Since: May 2017
Last Sign in: 399 Weeks Ago
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  • MCS,PHD
    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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  • Professor
    Phoniex University
    Oct-2001 - Nov-2016

Category > Management Posted 04 Mar 2018 My Price 5.00

resistivity of aluminum

Electrical conduction The resistivity of aluminum at 25 °C has been measured to be 2.72 × 10-8 ? m. The thermal coefficient of resistivity of aluminum at 0 °C is 4.29 × 10-3 K-1 . Aluminum has a valency of 3, a density of 2.70 g cm-3 , and an atomic mass of 27. a. Calculate the resistivity of aluminum at -40ºC. b. What is the thermal coefficient of resistivity at -40ºC? c. Estimate the mean free time between collisions for the conduction electrons in aluminum at 25 °C, and hence estimate their drift mobility. d. If the mean speed of the conduction electrons is about 2 × 106 m s-1 , calculate the mean free path and compare this with the interatomic separation in Al (Al is FCC). What should be the thickness of an Al film that is deposited on an IC chip such that its resistivity is the same as that of bulk Al? e. What is the percentage change in the power loss due to Joule heating of the aluminum wire when the temperature drops from 25 °C to -40 ºC?

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Maurice Tutor
(5)
Status NEW Posted 04 Mar 2018 08:03 PM My Price 5.00

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