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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.
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Mention two salient features of immunity theory of ageing. Write the full form of ESR. What does the increase in ESR indicate?
Surface Mount Devices (SMDs) are new components designed with soldering pads or short leads. They are much smaller in size as compared to leaded components. The SMDs are directly a
Instantaneous velocity and speed are explained at a given or particular instant and are shown by ,
Which colour has got the minimum angle of deviation?
a column of water contains fine metal particles of radius 2*E(-8) m, which are in thermal equillibrium at 298 K. if there are 1000 particles per unit volume at a given height,how m
MOTION: A body is said to be in motion if it alters its position with respect to its surroundings.
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Two Cars in 2-Dimensional Collision Inelastic Collision : Collisions among objects are governed through laws of momentum and energy. While a collision occurs within an isola
application of electrostatic
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