32 32 -What is the critical temperature Te for Hg known as superconductors?O A) 3.3 KО В) 2.4 КОС) 5.2 КO D) 1.6 KO E) 4.2 K

Critical temperature: The critical temperature of a superconductor is defined as the temperature at…

Answered: What is the critical temperature Te for…

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter9: Condensed Matter Physics

Section: Chapter Questions

Problem 80P: What is the critical magnetic field for lead at T = 2.8 K?

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Measurements of a superconductor's critical magnetic field (in T) at various temperatures (in K) are given below. Use a line of best fit to determine Bc(0). Assume Tc = 9.3 K.
The Csl crystal structure is BCC. The equilibrium spacing is approximately r0=0.46nm . If Cs+ ion a occupies a cubic volume of r03, what is the distance of this ion to its "nearest neighbor” I+ ion?
A section of superconducting wire carries a current of 100 A and requires 1.00 L of liquid nitrogen per hour to keep it below its critical temperature. For it to be economically advantageous to use a superconducting wire, the cost at cooling the wire must be less than the cost of energy lost to heat in the wire. Assume that the cost of liquid nitrogen is $0.30 per liter, and that electric energy costs What is the resistance of a normal wire that costs as much in wasted electric energy as the cost of liquid nitrogen for the superconductor?
A tightly wound solenoid at 4.0 K is 50 cm long and is constructed from Nb wire of radius 1.5 mm. What maximum current can the solenoid carry if the wire is to remain superconducting?
Determine the Fermi energies for (a) Mg, (b) Na, and (c) Zn.
What happens in the extreme case that where the n- and p-type materials are heavily doped?
In cesium iodide, how many Clatoms are "nearest neighbors” of Cs+? How many Cs+ atoms are "nearest neighbors” of Cl?
Verify that the ground state energy E0 is 13.6 eV by using E0=22qe4mek2h2.
2) Critical magnetic fields of a certain superconductor are experimentally measured as 0.175 T at 15 K and 0.700 T at 12 K. a) Calculate the transition temperature. b) Calculate critical fields at 0 Kand 8 K 2) Critical magnetic fields of a certain superconductor are experimentally measured as 0.175 T at 15 K and 0.700 T at 12 K. a) Calculate the transition temperature. b) Calculate critical fields at 0 K and 8 K.
150) Calculate the temperature required to have 25% of H atoms in the first excited state and 75% in the ground state considering kB = 8.6 x 10-5 eV/K, E2-E1 = 10.2 eV and In 3 = 1.0986. (Symbols/notations assume their usual meaning) A) = 10 K B) = 105 K C)=106 K D) = 1010 K
4) Molybdenum has a BCC crystal structures, the density of molybdenum is 10.22 g/cm³ and its atomic mass is 95.94 g/mol. What are the atomic concentration, the lattice parameter a and the atomic radius of molybdenum. What is the atomic concentration in the primitive cell? 5) Tungsten (W) has the BCC crystal structure. The radius of the W atom is 0.1371 nm. The atomic mass of W is 183.8 amu (g/mol). Calculate the number of W atoms per unit volume and the density of W (NA = 6.02 x 10²3).
7. If the radius of the nucleus R = 12x 10^-13 cm, and known it is 1 fermi = 10^-13 cm, the nuclear radius of the 12C carbon atom is a. 1.2 fermi b. 2.7 fermi c. 3.6 fermi d. 1.7 fermi e. 2.2 fermi

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What is the critical temperature Te for Hg known as superconductors? O A) 3.3 K B) 2.4 K OC) 5.2 K OD) 1.6 K O E) 4.2 K