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The world is derived from the Greek world which means to squeeze or press. It is usually described as the generation of electricity as a result of mechanical pressure. "When mechanical pressure is applied to any one of these materials, the crystalline structure generates a voltage which is proportional to the pressure." On the other hand when an electric field is applied, the structure changes shape creating dimensional alterations in the material only if the lattice owns no centre of symmetry, the phenomenon being called as piezoelectricity. This property is found in certain classes of crystalline materials including natural crystals of Quartz, Rochelle salt and tourmaline plus manufactured ceramics such as barium and lead
This special crystal structure has no centre of symmetry. This unit cell has a centre of symmetry. When unstressed the centre of the mass of the negative charges at the centre as shown. There is therefore no net polarization in the unit cell and p=0 when a mechanical force is applied to the cell in which the second row of charges is a line of symmetry. The distance between the second and third; the centre of mass of the negative charges still coincides with the positive charge. Hence, there is no change in the electric. This result is generally true for all crystal that has a centre of symmetry.
Concurrent angular acceleration means angular acceleration at a particular dot instant at t = t 1 mathematically it is given as,
Ask questionwhat r the axis&planes in human body.? In nature or in daily life is it applied or happening? #Minimum 100 words accepted#
varacter diode
The statement ‘Charge is quantized’?
How is Specific Gravity defined? Specific Gravity, SG, is a unit less quantity that provides the scientist or engineers an idea of how dense a substance is compared to water. T
Light is quantized. Photons are light quanta. It has zero REST mass. Therefore, it always travels at maximum speed permitted by relativity.
What is Wheatstone bridge? Assume the condition for which Wheatstone bridge is balanced.
find acceleration of spacecraft will changed during journey and velocity and displacement if formula for displacement " s " and velocity V S=ut +1/2 at.... (t to power 2) V= u+at
Explanation on forces and how to create force diagrams
In case of dextro rotation we consider angle positive & in case of leavo rotatory we consider negative. But in Maths Rotation to left increases value of angle ( + ve)& towards righ
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