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

Author Question: The BCS theory of superconductivity details the working of a superconductor. Choose the statement ... (Read 52 times)

Mr3Hunna

  • Hero Member
  • *****
  • Posts: 536
on: Jul 28, 2018
The BCS theory of superconductivity details the working of a superconductor. Choose the statement below that describes one of its characteristics.
 
 

a. Single electrons are responsible for establishing currents in the superconductor.
  b. Currents flow without resistance until the lattice begins to vibrate.
  c. The repulsion of electrons in pairs is significantly reduced by the extremely low temperatures of superconductor operation, making electron pairing possible.
  d. A pair of electrons becomes like a boson and transitions to a ground state with other electron pairs.


  e. The resistance decreases in proportion to the lattice vibrations, which in turn decrease with decreasing temperature.
 

Question 2

The Meissner effect in a superconductor
 
a. is lost higher than the Curie temperature.
  b. generates currents to counteract magnetic flux.
  c. makes the superconductor a perfect paramagnet below the critical field level.
  d. is independent of the zero resistivity property of a superconductor.
  e. can remain even after the temperature goes above the transition temperature.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

ashely1112

  • Sr. Member
  • ****
  • Posts: 347
Reply #1 on: Jul 28, 2018
Answer to Question 1

d.
The two fermionic electrons pair to form a boson, which does transition to the superconducting state. This state is similar to superfluid helium, the Bose-Einstein condensate.

Answer to Question 2

Because the electrical resistivity of a superconductor is zero, arbitrarily large currents generate within the superconductor to oppose any magnetic flux (up to a certain critical field) within the material. This is known as the Meissner effect.
b.


Mr3Hunna

  • Member
  • Posts: 536
Reply 2 on: Jul 28, 2018
Excellent

AISCAMPING

  • Member
  • Posts: 347
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.

Did you know?

Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

Did you know?

As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.

Did you know?

In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.

Did you know?

Allergies play a major part in the health of children. The most prevalent childhood allergies are milk, egg, soy, wheat, peanuts, tree nuts, and seafood.

The endosymbiosis theory The endosymbiosis theory
Despite the traditional focus on males, females actively choose mates and are the driving force in t Despite the traditional focus on males, females actively choose mates and are the driving force in t
John Lennon - Working Class Hero John Lennon - Working Class Hero
Details of the shikimic acid pathway, I Details of the shikimic acid pathway, I
Big Bang Theory Big Bang Theory
The James-Lange Theory of Emotion The James-Lange Theory of Emotion
Video: Pores and Ion Channels

For a complete list of videos, visit our video library