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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.
Q. Tunnels through the Earth Assume a straight tunnel is cut from the surface of the earth to the opposite side through the centre. The object is going down the tunnel and a
A copper wire whose diameter is 0.16 cm carries a steady current of 10 A. What is the current density of the wire?Also calculate the drift velocity of the electrons in copper.
1. Cell growth. if V is the volume of a spherical cell, then, in certain cell growth or for some fetal growth models, the rate of change of V is given by dV/dt =kV2/3, where k
working and construction of fabry perot interferometer
Vector Addition The Order Does NOT Matter The question frequent arises as to the significance of the order in that the vectors are added. For example, if five vectors are added
For a reversible process involving ideal gases in a closed system, show that ΔS = C v ln(T 2 /T 1 ) for a constant volume process ΔS = C p ln(T 2 /T 1 ) for a constant pres
A confined quantity of air undergoes two thermodynamic processes departing from an initial equilibrium state where the temperature is 20°C, the absolute pressure is 1bar, and the v
Q. Point out the direction of the current if any induced to flow in the coil by the changing magnetic field. Answer: 1. Given: declining number of magnetic field line
If the angle of incidence is 60 degrees,then what is the angle of deviation?
Cross Product The direction of the cross product of 2 vectors is elaborates. The magnitude shown is correct but not discussed.
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