This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Which of the following does NOT contribute to the thermoelectric effect? a.Conduction electrons ... (Read 65 times)

EAugust

  • Hero Member
  • *****
  • Posts: 550
on: Jul 28, 2018
Which of the following does NOT contribute to the thermoelectric effect?
  a.Conduction electrons pass thermal and electrical energy.
  b. Higher temperatures cause more electrons to be in excited states.
  c. The conduction and resistive properties of a semiconductor are related to temperature.
  d. In a metal, some electrons are essentially free.
  e. The magnetic moments of electrons in metals tend to align when heated.

Question 2

How does increasing the temperature affect a semiconductor?
 
a. The band gaps increase in energy.
  b. The resistance decreases linearly with increasing temperature.
  c. More and more electrons are near the Fermi energy.
  d. The electrons separate from their paired state when the resistance increases.
  e. At the critical temperature, the semiconductor becomes an impurity semiconductor.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

brbarasa

  • Sr. Member
  • ****
  • Posts: 308
Reply #1 on: Jul 28, 2018
Answer to Question 1

e.
This statement is not true. The magnetic moments of electrons within metals do not necessarily align when heated, and most often heating disrupts the alignment of the magnetic moments. This occurs in ferromagnets and paramagnets.

Answer to Question 2

c.
With the temperature increased, more and more electrons are close to being excited into the conduction band and participating in the electrical and thermal conduction processes within the semiconductor.


EAugust

  • Member
  • Posts: 550
Reply 2 on: Jul 28, 2018
Gracias!

diana chang

  • Member
  • Posts: 288
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

Certain topical medications such as clotrimazole and betamethasone are not approved for use in children younger than 12 years of age. They must be used very cautiously, as directed by a doctor, to treat any child. Children have a much greater response to topical steroid medications.

Did you know?

Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.

Did you know?

According to the American College of Allergy, Asthma & Immunology, more than 50 million Americans have some kind of food allergy. Food allergies affect between 4 and 6% of children, and 4% of adults, according to the CDC. The most common food allergies include shellfish, peanuts, walnuts, fish, eggs, milk, and soy.

Did you know?

Adults are resistant to the bacterium that causes Botulism. These bacteria thrive in honey – therefore, honey should never be given to infants since their immune systems are not yet resistant.

Did you know?

Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

Electrons Electrons
Effect of a Black Hole’s Tidal Force on Infalling Matter Effect of a Black Hole’s Tidal Force on Infalling Matter
Effect of RYGB Surgery in Rats Effect of RYGB Surgery in Rats
Conduction and gas exchange structures and functions. Conduction and gas exchange structures and functions.
Factors That Contribute to Eating Disorders Factors That Contribute to Eating Disorders
Draw the electric field of: •An electron and proton •Two electrons Draw the electric field of: •An electron and proton •Two electrons
Video: Decubitus Ulcer

For a complete list of videos, visit our video library