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Chapter 20: Problem 32

Cite the primary limitation of the new superconducting materials that have relatively high critical temperatures.

Short Answer

Expert verified
Answer: The primary limitation of new superconducting materials with relatively high critical temperatures is that they require extremely high pressures to achieve superconductivity, which is not practical for most real-world applications.

Step by step solution

01

Understand the concept of superconductivity

Superconductivity is a phenomenon that occurs in certain materials when they are cooled below a specific temperature called the critical temperature. At this temperature, the material's electrical resistance drops to zero, allowing it to conduct electricity without any loss of energy.
02

Define relatively high critical temperatures

A relatively high critical temperature in the context of superconducting materials means that they become superconducting at temperatures above the critical temperatures of conventional superconductors, which are typically below -200°C. This makes them more practical for various applications as they can operate at easier to achieve and maintain temperatures.
03

Identify the primary limitation of new superconducting materials with relatively high critical temperatures

The primary limitation of these new superconducting materials with relatively high critical temperatures is that they require extremely high pressures to achieve superconductivity, which is not practical for most real-world applications. The high pressure requirement often limits the use of such materials in practical applications such as electronics and energy transmission, and thus remains a significant challenge for scientists and engineers to overcome.

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Most popular questions from this chapter

An iron bar magnet having a coercivity of \(7000 \mathrm{~A} / \mathrm{m}\) is to be demagnetized. If the bar is inserted within a cylindrical wire coil \(0.25 \mathrm{~m}\) long and having 150 turns, what electric current is required to generate the necessary magnetic field?

Assume there exists some hypothetical metal that exhibits ferromagnetic behavior and that has (1) a simple cubic crystal structure (Figure 3.3), (2) an atomic radius of \(0.125 \mathrm{~nm}\), and (3) a saturation flux density of \(0.85\) tesla. Determine the number of Bohr magnetons per atom for this material

A coil of wire \(0.5 \mathrm{~m}\) long and having 20 turns carries a current of \(1.0 \mathrm{~A}\). (a) Compute the flux density if the coil is within a vacuum. (b) A bar of an iron-silicon alloy, the \(B-H\) behavior for which is shown in Figure \(20.29\), is positioned within the coil. What is the flux density within this bar? (c) Suppose that a bar of molybdenum is now situated within the coil. What current must be used to produce the same \(B\) field in the Mo as was produced in the iron-silicon alloy (part b) using \(1.0 \mathrm{~A}\) ?

Cite the differences between hard and soft magnetic materials in terms of both hysteresis behavior and typical applications.

Cite the differences between type I and type II superconductors.
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