Concept explainers
(a)
The intrinsic electrical conductivity of
(a)
Answer to Problem 83AAP
The intrinsic electrical conductivity of
Explanation of Solution
Write the expression for the conductivity of
Here, the intrinsic carrier is
Convert the temperature from degree Celsius to Kelvin.
Write the expression for the conductivity of
Here, the Boltzmann constant is
Conclusion:
Refer to table 14-6 “ electrical properties of intrinsic semiconducting compounds at room temperature
Refer to table 14-6 “ electrical properties of intrinsic semiconducting compounds at room temperature
Here, the charge is
Substitute
Substitute
Thus, the intrinsic electrical conductivity of
(b)
The intrinsic electrical conductivity of
(b)
Answer to Problem 83AAP
The intrinsic electrical conductivity of
Explanation of Solution
Write the expression for the conductivity of
Here, the intrinsic carrier is
Convert the temperature from degree Celsius to Kelvin.
Write the expression for the conductivity of
Here, the Boltzmann constant is
Conclusion:
Here, the charge is
Refer to table 14-6 “ electrical properties of intrinsic semiconducting compounds at room temperature
Refer to table 14-6 “ electrical properties of intrinsic semiconducting compounds at room temperature
Substitute
Substitute
Thus, the intrinsic electrical conductivity of
Want to see more full solutions like this?
Chapter 14 Solutions
Foundations of Materials Science and Engineering
- A piezoelectric material has a Young’s modulus of 72000 MPa. What stress is required to change its polarization from 640 C/m2 to 645 C/m2?arrow_forwardThe band gap in silicon is 1.12 eV. Calculate the maximum wavelength of electromagnetic radiation that results in promotion of electrons from the valence to the conduction band.arrow_forwardA 90 wt% Cu - 10 wt% Ni alloy is known to have an electrical resistivity of 1.90 x 10-7 Ω * m at room temperature (25◦C). (a) Calculate the composition of a copper-nickel alloy that gives a room-temperature resistivity of 2.5 x 10-7 Ω * m. The room-temperature conductivity of pure copper is 6.0 x 107 [(Ω * m)−1] (from Table 18.1); assume that copper and nickel form a solid solution. (b) Briefly discuss the validity of your assumption that copper and nickel form a solid solutionarrow_forward
- 1. The resistivity of aluminum is 2.8 x 10-8 Nm. How long (in meters) a piece of aluminum wire 1.0 mm diameter is needed to give a resistance of 4.0 0?arrow_forwardA nominal 7 Ah Li-ion battery has an open cell potential of 3.6 and is being charged at 0.75 C. The cell resistance is a constant 10 m\Omega, and the Tafel equation for this cell is -0.02 + 0.055log(1). Considering Ohmic and activation polarization, determine: cell potential during charging and charging efficiency. What is the rate of heat generation (in kW) from irreversible losses duringthis charging process, based on the nominal capacity?arrow_forward3. Suppose that these atomic configurations belong to Al at 30 °C, Select the correct answer about electrical resistivity? (1) (2) (3) Perfect Crystal terst impurity t Low defects No defects High defectsarrow_forward
- At room temperature (20°C) the electrical conductivity of Gallium phosphide (GaP) is 63 (2.m)–1, whereas the electron and hole mobility are 0.24 and 0.057 m²/V-s, respectively. a) Compute the intrinsic carrier concentration for GaP at room temperature, (q=1.6 x 10 -19 c). b) If the energy gap of GaP is 0.92 eV, calculate its conductivity at 70°C (k= 8.62 x 10 eV/K). -5arrow_forwardEngineering science Distinguish elastic, electrical and magnetic hysteresis in different Materials.arrow_forwardTungsten (W) crystallizes in cubic structure. The edge length of the unit cell of this crystal structure is a = 3.1648 Å. Calculate the structure factor Fhkl for this crystal structure for the (110) and (200) planes. Here the scattering factor is fW (110) = 58 and fW (200) = 51. In this crystal structure, two W atoms are in (0,0,0) and (0.5,0.5,0.5) positions, respectively.arrow_forward
- M4.25 (Sl units) What is the resistance R of a length of copper wire whose length 10 m and whose diameter 0.30 mm? Use Table 4.3 of the book for reference. Round to the nearest thousandth of an ohm ()arrow_forward4. Compare and contrast electric domain walls to magnetic Bloch walls. Consider such items as wall thickness, direction of polarization or magnetization, and factors that influence on each.arrow_forward(a) Calculate the standard free energy change as a pair of electrons is transferred from succinate to molecular oxygen in the mitochondrial respiratory chain.(b) Based on your answer in part a, calculate the maximum number of protons that could be pumped out of the matrix into the intermembrane space as these electrons are passed to oxygen. Assume 25 °C, ΔpH = 1.4;Δψ = 0.175 V (matrix negative).(c) At which site(s) are these protons pumped?arrow_forward
- Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University PressMechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSONThermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
- Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEYMechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage LearningEngineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY