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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.
NEWTON'S FIRST LAW OF MOTION: This law states that "A body at rest will remain at rest and a body moving with uniform velocity will carry on doing so, until acted on by some un
Q. What is Heisenberg's uncertainty principle? Write the three forms of uncertainty relations. Ans. The principle of uncertainty was described by Heisenberg in 1927. Acco
electric field
one coin is thrown upword from 100m top building with velocity 15m/s .2s later 2nd coin is dropped downword at what distance from top of building 2nd coin cross first? Ans) They
Q. What is the dissimilarity between isolation transformers and step up or step down transformer? Answer:- In fact an isolation transformer may be physically the same as a
what are like and unlike parallel force?
It describes the temperature above which the material loses its spontaneous polarization and piezoelectric characteristics.
The resultant of two forces 3P and 2P is R. If the first force is doubled then the resultant is also doubled. then the angle between the two forces us. plz xplain with the solution
When a physical property such as charge exists in discrete "packets" rather than in continuous amounts, the property is said to be: a) Discontinuous b) Abrupt c)
Using an Optical Bench This applet permits users to simulate standard optic elements that is lens, mirror, dielectrics, sources, apertures and observe the ways in which light r
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