session.masteringphysics.com | Course Home MasteringPhysics: HW9-Chpt. 29 HVW9-C
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session.masteringphysics.com | Course Home MasteringPhysics: HW9-Chpt. 29 HVW9-Chnt 29Alternative Exercise 29.79 a previous| 9 of 17 next a Alternative Exercise 29.79 What is the resultant magnetic field B inside the cylinder at points far from its ends just before the magnetic flux begins to penetrate the material? The compound SiV3 is a type-ll superconductor. At temperatures near absolute zero the two critical fields are = 55.8 mT and Be2 -39.9 T. The normal phase of SiVs has a magnetic susceptibility close to zero. A long, thin SiVa cylinder has its axis parallel external +x-direction. At points far from the ends of the cylinder, by symmetry, all the magnetic vectors are parallel to the x-axis. At a temperature near absolute zero the external magnetic field is slowly increased from zero. ? to an extermal magnetic field Bo in the Submit My Answers Give Up Part B What is the resultant magnetization M inside the cylinder at pointsfar from its ends just before the magnetic flux begins to penetrate the material? i A/m Submit My Answers Give Up Part C What is the resultant magnetic field B inside the cylinder at points far from its ends just after the material becomes completely normal? Submit My Answers Give Up Part D What is the resultant magnetization M inside the cylinder at points far from its ends just after the material becomes completely normal? mmExplanation / Answer
Problem 29.79)
a) When Bo is just under BC1 ,the magnetic field in the material must be zero.i.e B=0
b) From B = Bo + uoM
=>M = -BC1/uo = -(55.8 x 10-3)i/(4pi x 10-7)
M = -(4.44 x 104 A/m)i
c) When Bo is just over BC2 ,there is zero magnetization
B = BC2 = (-39.9T)i
d) M = 0
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