The resistivity of semiconductors and insulators decreases linearly with the increase of temperature. a) True b) False
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The resistivity of semiconductors and insulators decreases linearly with the increase of temperature.
a) True
b) False
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- Computers and servers consist of a large number of components that are semiconductors. Why is it essential that these components be cooled to maintain optimal performance? A. Semiconductors have varying resistance depending on the temperature B Semiconductors operate in high current circuits that would heat the room to uncomfortable lev els in a short amount of time C Semiconductors are always so small that any heat would quickly melt the wire attached to it D It is not necessary to cool semiconductors they work well at all temperatureQ2) If the electron concentration increase along the x-axis of a conductor as shown in equation below: n=1028+5x1030x+4x1033x2 And the electron diffusion constant is 1.2×10*m²/s. Find the diffusion current density at x = 5mm. (3 marks)Is it possible to explain the difference between a conductor and an insulator by referring to a semiconductor? A graph would be a great way to illustrate your arguments.
- 1) a) A wire sample (1 mm in diameter by 1 m in length) of an aluminum alloy (containing 1.2% Mn) is placed in an electrical circuit such as that shown in the figure below. A voltage drop of 432 mV is measured across the length of the wire as it camies a 10 A current. Calculate the electrical conductivity of this alloy -Length, / Area, A Sample geometry b) Copper has an electrical conductivity of 58.00 x 106 S/m and a free electron density of 104 x 10²7m²³. Calculate the drift velocity of these electrons under an electric field of 0.5 V/m.Q1: A conductive wire has a resistivity of (0.649x10-8(Q.m)') at room temperature are (5.8x10* ) conduction electron/m3.Calculate the mobility, resistivity and relaxation time of electrons.Q2/ If the resistivity of pure silicon is 2300 (0. m) and assuming that the valance electrons of silicon is 4. Let T = 300 K. (a) Calculate the electron density per cubic meter (b) Calculate the electron mobility when the electron density is doubled. Note: Avogadro's number is 8.61 x 10 mol Atomic mass of silicon is 28.08 g/mol, mass density is 2.33 g/cm
- Can a semiconductor be used to describe the distinction between a conductor and an insulator? Why not use a graph to support your arguments?QUESTION 6 Find the uncertainty in a calculated electrical potential difference from the measurements of current and resistance. Electric potential difference depends on current and resistance according to this function V(I,R) = IR. Your measured current and resistance have the following values and uncertainties 1 = 1.5 Amps, Sl = 0.2 Amps and R = 36.4 Ohms and SR 0.3 Ohms. What is the uncertainty in %3D the , SV ? Units are not needed in your answer.You plotted a graph of current vs. voltage and found the slope of the best fit line is m± Am = 4.69 ± 1.79 Amps/Volt. The resistance can be calculated from the slope by knowing: R = 1 m The fractional uncertainty in the slope is equivalent to the fractional uncertainty in the resistance: AR R = Am m Calculate the uncertainty in the resistance, AR in units of (ohms), then enter the raw value (no units) into the box below. Round to two decimal places. AR=