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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.
Define free vector
The I beam weighs 0.6kN/m and supports the load which is P33 kN as shown. The distance from the load to point B is P34 m. Determine the vertical support reactions at A and B. (A
A record player's needle is 6.5 cm from the center of a 45-rpm record. Calculate velocity of the needle?
'Heavy water is often used as a moderator in thermal nuclear reactors.' Give reason.
A thin rod of length 1 m is fixed in a vertical position inside a train, which is moving horizontally with constant acceleration 4 m/s2. A bead can slide on the rod, and friction
A coil of inductance 100 mH and resistance 800Ω is connected in parallel with a variable capacitor across a 12V, 5kHz supply. Determine for the condition when the supply curre
An electric motor is a device which converts electrical energy into mechanical energy. Principle of electric motor : An electric motor essentially consists of a rectangular co
It explains that when an object is immersed partly or completely in a liquid, it loses in weight similar to the weight of the liquid displaced by it. Let w1 be weight of an obje
Q. Find the electric potential at a distance 0.09 m from a charge of 4 X 10 -7 C. The electric potential V = ( 1/4πεo ) q /r = ( 9 X 10 9 X 4 X 10 -7 )/ 9 X 10 -2 = 4 X 10
Phenomenon of resonance At resonance, rapid transfer of energy takes place resulting louder sound (booming sound). If two bodies having same natural frequency is placed side b
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