Niobium metal becomes a superconductor (with zero electrical resistance) when cooled below 4.5 K. The permeabilty of free space is 1.25664 x 10-6 N/A?. If superconductivity is destroyed when the surface magnetic field exceeds 0.06 T, deter- mine the maximum current a 1.8 mm diame- ter niobium wire can carry and remain super- conducting. Answer in units of A.

Niobium metal becomes a superconductor (with zero electrical resistance) when cooled below 4.5 K. The permeabilty of free space is 1.25664 x 10-6 N/A?. If superconductivity is destroyed when the surface magnetic field exceeds 0.06 T, deter- mine the maximum current a 1.8 mm diame- ter niobium wire can carry and remain super- conducting. Answer in units of A.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter11: Magnetic Forces And Fields

Section: Chapter Questions

Problem 11.5CYU: Check Your Understanding A Hall people consists of a copper strip, n=8.51028 electrons per cubic...

See similar textbooks

Similar questions

d dompel mass pxing syatem , m= ao0sk=85N ohd b= 659/3. Calculte how bog it wiell take for its Cnesay to dsop one thisd of its ini tial Value? it
a Bar of intrinsic -3 silicon having a cross-sectional area of 3x10-4 m² has an n; = 1.5×10¹6 m²³. If n = 0.14 m² /V.sand up = 0.05 m²/V.s, how long should the bar be in order that the current in it be 1.2 mA when 9 V is applied across its ends.
5. Find hall coefficient, electron density and the angle between the field, for a silicon wire with thickness 2mm, while the applied magnetic field is 0.1T, carying a current 10mA, hall voltage Imv and the mobility 0.36mNS.
Check Your Understanding A Hall people consists of a copper strip, n=8.51028 electrons per cubic meter, which is 2.0 cm wide and 0.10 cm thick. What is the magnetic held when I = 50 A and the Hall potential is (a) 4.0µV and (b) 60µV?
How deep will (a) 10 keV e-beam penetrate intosilicon and (b) 50 keV beam into quartz?.
1 (a) Using Townsend's second ionization criterion, consider I, 4 x 10-7 A. Consider a = 2.28/cm. If y = 0.0075, find the gap spacing dspark in cm for spark breakdown criterion. Calculate the current I in A for (i) d = 0.45 xdspark , (ii) d = 0.6 x dspark and (iii) d = 0.8 x dspark Show that the current I = Io exp (ad) when d is very small value and y is also very small value. 1,ead 1- y(ead – 1) (b) For a point-plane gaseous dielectric system, suppose values of a = 2.24 / cm and y = 0.0064. d Find the values of for d = 1.25 cm and d = 1.95 cm. dd
An AL wire with an atomic mass of 26.98 g/mole with a cross sectional area of 4 x 10-6 /m2 carries a 5Acurrent. Find the drift velocity of the electrons in m/s through the wire, assuming that each Al atomcontributes an electron. The density of Al is 2.7 g/cm3.
Conduc-Thor-s. Thor has two square prism conductors that are made of the same ohmic material and with properties indicated below. Conductor Length Cross-Section Side Length Alpha Beta L/2 8/4 Suppose both conductors are subject to the same potential difference AV across their length while keeping their temperatures fixed. Which of the following is the correct relation between the electric currents, I, and Ig, through Aipha and Beta? O A. I = 81, %3D O B. 8I. = I3 Oc. Ia = 413 O D. 4la = I3
Hall measurements are made on a p-type semiconductor bar 500 u,m wide and 20 u,m thick. The Hall contacts A and B are displaced 2 p-m with respect to each other in the direction of current flow of 3 mA. The voltage between A and B with a magnetic field of 10 kG (lkG = 10^-5 Wb/cm2) pointing out of the plane of the sample is 3.2 mV. When the magnetic field direction is reversed the voltage changes to - 2 .8 mV. What is the hole concentration and mobility?
A Hall probe made from a semiconductor in the form of a cube of side 1 mm is being designed to measure a magnetic field. If the carrier concentration is 5x1017/cm and the operation current density for the probe is 10 mA/cm². find the probe sensitivity in unit V/T. Assume a mobility of 0.5 m2/Vs.
The intrinsic carrier concentration of silicon (Si) is expressed as - E n₁=5.2×10¹5T¹.5exp- i electrons at 30°C. n = cm -3 g 2kT cm -3 where Eg = 1.12 eV. Determine the density of Round your answer to 0 decimal places.
Lead has Tc = 7.19 K and Hc = 63 901 A m-1. At what temperature does lead become superconducting in a magnetic field for 20 kA m-1?