Question

Consider two materials bismuth and aluminum with χ m = −20 ×10−5 and χ m = 2 ×10−5 respectively. Find the magnetization vector and the magnetic field in these materials when they are under an external magnetic field of 1 T in direction x. What are the types of these two magnetic materials?

3. Consider two materials bismuth and aluminum with X=-20 x 10- and X. - 2 x 10", respectively. Find the magnetization vector and the magnetic field in these materials when they are under an external magnetic field of 1 T in direction x. What are the types of these two magnetic materials? A soft ferromagnetic material with x = 100 and a coercive field of u, H.-10 T is used for information storage. If a solenoid with 100 turn per unit length is used as the writing head, what is the minimum current required that we need to pass through the solenoid to write a data. Explain the difference between hysteresis B-H curves for soft and hard magnetic materials. solenoid

Answer 1

sota Eigmula = -2013 ) 11-09 LUGEDEELTE P Km it negative and Bonell. Bismuth is a diamagnetic noaterial, M = xom, H = Xm Bollo - M=(-20X15) ( i wybima) / (497157 well] m-a) M= - 2:51.3 378 10+2 Ami! M= - 95132.7 Alom » N hực Sim diaft - x ditch - Magnetic field = 8. + H. t = 8.+ Xm6. = B.( 1+km) = 1 (1-26X16*5) rre - 0.9991T in Alumisien - Y = axlos → Xw is ebitie and Small Alumirum is Paramagnetie material. ME Xx H = Xin Bol do = ( 2x155) X 1 X un X157 - M=15.7 Am → Positive sign indicates +x dim. pogrine pile = B. (1+ Xma) = 1 * (1+2X15) = (1+0.00002) = 1.00002T U He = 155, Xen= 100, = 100 & he ha lo he = 1555 B = lottu, n = lo he + Mo (Xm He) = Mo He(1+xml & B= 155 x 10l = 1013155 Whlme on Tezle magnetic field . ** 9 I = He = @ = 101 X 178 100 4x100 4nxitx 106 I = 9:03 A

Difference between hy stereosis 8-H Curses for off thonod mogatic modeñal:- H soft Iron, Lojisinin - Hard, Alnico v alloy →. Mamow B-H loop → 51% Fe, 0% Al, 14% N1,24%,00 A large magnetization Change!! X + 1 = Mg + 3% cu. Tu composition very critical foron a very small applied ficelo - heide B-H loop larger than → Useful for trane former and motor. - soft Pron Good permament magntic