What is the minimum band gap that is needed

Assignment Help Mechanical Engineering
Reference no: EM131361129

1. Consider an intrinsic material at 300 K. Under pressure, the band gap is reduced from 1.6 to 1.5 eV. By what factor does the electrical conductivity of this material increase?

2. Suppose you wish an intrinsic material to remain an electrical insulator at 800 K, having less than one conduction electron per cubic centimeter of material. What is the minimum band gap that is needed?

Reference no: EM131361129

Questions Cloud

What is an organization and the key aspects that comprise it : Organizational Communication Perspective In light of your critical reflection upon the course readings so far, your own research (e.g., articles, books, and professional journals), and your professional experience, articulate your own organizati..
What is her learning rate : Elizabeth completed the first bookcase in 5 hours and the second in 4 hours. What is her learning rate? Assuming that the same rate continues, how long will the 3rd bookcase take
Mean charge for a particular type of laboratory test : An insurance company will sample recent health insurance claims to estimate the mean charge for a particular type of laboratory test. The insurance company wants to be 99% confident of the final estimate and desires a margin of error of no more th..
Determine the chances that a patient enters x-ray department : Simulate the trail followed by 10 emergency room patients. Proceed, one patient at a time, from each one's entry at the initial exam station until he or she leaves throughout-processing. Using your simulation data, determine the chances that a pati..
What is the minimum band gap that is needed : Suppose you wish an intrinsic material to remain an electrical insulator at 800 K, having less than one conduction electron per cubic centimeter of material. What is the minimum band gap that is needed?
Customer service positions in a company : An employer interviews 10 people for 6 customer service positions in a company, and 5 of the 10 people are men. If all 10 are qualified, in how many ways can the employer fill the customer service position if exactly 2 are men?
What temperature will this semiconductor become intrinsic : At 300 K, how many conduction electrons come from donor levels? From the valence band?
Probability that a student scores : The average score on a standardized test is 750 points with a standard deviation of 50 points. What is the probability that a student scores more than 700 on the standardized test?
Describe your one or more data collection techniques : A brief summary of your topic and hypothesis as well as the major components of the research proposal.Summarize at least five relevant/related research projects. This part of the proposal can be taken from a modified version of your Review of Liter..

Reviews

Write a Review

Mechanical Engineering Questions & Answers

  . indicate whether each member is in compression or tension

Determine the forces in members DE, and DJ, and IJ using the method of sections. Indicate whether each member is in compression or tension.

  A 012-m3 rigid tank contains saturated refrigerant- 134a at

a 0.12-m3 rigid tank contains saturated refrigerant- 134a at 800 kpa. initially 25 percent of the volume is occupied by

  Air enters the compressor of an air-standard brayton cycle

air enters the compressor of an air-standard brayton cycle at 100kpa 300k with a volumetric flow rate of 5m3s. the

  Air enters the compressor of a gas turbine at 100 kpa 300 k

air enters the compressor of a gas turbine at 100 kpa 300 k and a volumetric flow rate of 5.0 m3s. the air is

  What are the sources of band broadening in 13c spectra

How are lines narrowed so that high-resolution spectra can be obtained?

  What is an exergy factor 8 what is a pinch point and what

what is an exergy factor? 8 what is a pinch point and what is it used for? 9 what does the compressor in figure 2 do?

  Volume at beginning of isothermal expansion

Two kilograms of air within a piston-cylinder assembly execute a Carnot power cycle with maximum and minimum temperatures of 750 K and 300 K, respectively. The heat transfer to the air during the isothermal expansion is 60 kJ. At the end of the is..

  To what pressure in atm should the air in the wind tunnel

a model of an airplane is to be tested at 20degc in a wind tunnel. the model is built to 112th scale. in order to match

  Determine a the maximum temperature in the cycle the net

a four-cylinder four-stroke 2.8-liter compression-ignition engine operates on the ideal dual cycle with a compression

  Show that the continutiy equation for a inviscid

show that the continutiy equation for a inviscid irrotational flow leads to leplaces eqaution in terms of the velocity

  A pressure gage reading is 20 mm deltahg if the gage is

a pressure gage reading is 20 mm deltahg. if the gage is located at an elevation of 2000m.what is the absolute

  How does the final length of the bar

How does the finallength of the bar compare with its originallength? (Hint: Use the concepts illustrated in Fig. 1-16.)

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd