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If we have to strain a ferromagnetic crystal along certain direction, we would change the inter atomic spacing not only along this direction but also in other direction. And hence the exchange interactions between the atomic spins are also changed. This would lead to a change in the magnetization property of crystal. When an iron crystal is placed in a magnetic field along an easy direction, it gets longer along this direction but contracts in the transverse directions. The longitudinal strain $l/l along the direction of magnetization is called magnetostriction constant denoted by λ. When the crystal reaches saturation magnetization, λ also reaches saturation called saturation strain. The crystal lattice strain energy associated with magnetostriction is called magnetostrictive energy. Magnetostriction is responsible for transformer hum noise.
Two resistors are connected in series across an 18V supply and a current of 5A ?ows. If one of the resistors has a value of 2.4Ω determine (a) the value of the other resist
A person is determining the description of the image formed by a converging lens by implies of a ray tracing diagram. The person has gotten so far as drawing one principal ray. Wha
What is the effect of torque and equilibrium on taps,handlebars and bicycles?
It is described by de-Broglie a moving material molecule sometimes acts as a wave and sometimes as a particle. The wave associated with moving particle is known as matter w
quantization of charge
show that in a glass prism that the refractive index n = sin1/2(A+Dmin)/sin1/2A where a = refracting angle. hence if the angle of incidence i on oan air boundary is 60degrees. calc
constraint motion
history
Infrared Waves: Infrared wave also known as heat wave. These waves are radiation by hot body at dissimilar temperature.
Why population inversion is essential to achieve in lasing action? a) Define zener breakdown. b) What is called nanomaterials?
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