In: Electrical Engineering
I am really sorry but these are related to each other, please and please show me all the steps with clear hand writing. thanks in advance
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(a) Calculate the electrical conductivity of copper if it is given that the metal has 8.5 x 1022 conduction electrons per cm3 and the mobility of a conduction electron is 35 cm2.V-1.s-1.
answer , units
(b) In an electronics project you need to construct your own inductor. The instructions for making this inductor is to “wind it from a 1.2 meter length of # 20 AWG (American wire gauge) copper wire.
(i) How thick is this wire in mm ?
(ii) What will be the resistance of your inductor ?
answer , units
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Q3) (i) Calculate the electrical conductivity of a piece of pure Si if it is given the number of intrinsic carriers at 300 K is 1 x 1010 cm-3 and that the electron and hole mobilities are μe = 1350 cm2.V-1.s-1 and μh = 450 cm2.V-1.s-1respectively.
answer, units
(ii) Compare the conductivities between Si and Cu at 300 K as calculated from Q2 and Q3(i).
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Q4) Following on from Q3, the temperature now increases to 350 K. Describe semi-quantitatively how and why the carrier concentration and the conductivity will change due to this temperature change for both these two materials (Si and Cu).