Engineering, 11.02.2020 22:56 xojade

You are given a piece of material (you suspect it's a semiconductor but are not sure) and know nothing about it (except that it looks transparent to the eye).

a. What is the minimum band gap energy that you expect this material to have?
b. Describe an experiment to determine its conductivity. Be specific about details: set up, what equipment is used to measure each variable, and plot the data you expect to get.
c. Describe an experiment (or set of experiments) to determine its energy gap, electron affinity, and ionization potential. Be specific as in b.
d. From the above experiments, how can you be sure it's a semiconductor and not a metal?

Answers: 2

Show answers

Other questions on the subject: Engineering

Engineering, 04.07.2019 18:10, tjeffers90028

Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26°c with a volumetric flow rate of 0.18 m3/s. refrigerant exits at 9 bar, 70°c. changes in kinetic and potential energy from inlet to exit can be ignored. determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kw.

Answers: 1

continue

Engineering, 04.07.2019 18:10, kevin72836

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?

Answers: 2

continue

Engineering, 04.07.2019 18:10, Strick1530

Which of the following components of a pid controlled accumulates the error over time and responds to system error after the error has been accumulated? a)- proportional b)- derivative c)- integral d)- on/off.

Answers: 2

continue

Engineering, 04.07.2019 18:10, salazjlove

Which of the following refers to refers to how well the control system responds to sudden changes in the system. a)-transient regulation b)- distributed regulation c)-constant regulation d)-steady-state regulation

Answers: 1

continue

You know the right answer?

You are given a piece of material (you suspect it's a semiconductor but are not sure) and know nothi...