Skip to main content

चार महीने का बच्चा कैसे बना अरब़पति

चार महीने का बच्चा कैसे बना अरब़पति? जन्म के सिर्फ चार माह बाद यदि कोई बच्चा अरबपति बन जाए तो इसे उसकी किस्मत ही कहेंगे। भारत के एकाग्रह रोहन मूर्ति नाम के बच्चे की किस्मत कुछ इसी प्रकार चमकी है। देश की दूसरी सबसे बड़ी आइटी कम्पनी इंफोसिस के फाउंडर नारायण मूर्ति ने सोमवार अपने चार महीने के पोते एकाग्रह मूर्ति को 240 करोड़ रूपए के शेयरों की हिस्सेदारी का तोहफा देकर उसे शायद देश का सबसे कम उम्र का अरबपति बना दिया है। BSE की फाइलिंग के अनुसार इंफोसिस में अब एकाग्रह रोहन की 15 लाख शेयरों की हिस्सेदारी हो गई है। इसका मतलब अब एकाग्रह रोहन इंफोसिस का 0.04% का हिस्सेदार है। शेयरों के स्थानान्तरण के बाद नारायण मूर्ति के पास कम्पनी के कुल शेयरों का 0.36% हिस्सा बचा है। जिस समय नारायण मूर्ति द्वारा अपने पोते को शेयर देने की खबर बाई उस समय इंफोसिस के शेयरों में गिरावट देखने को मिल रही थी। एकाग्रह रोहन, नारायण मूर्ति तथा सुधा मूर्ति के बेट रोहन मूर्ति और उनकी पत्नि अर्पणा कृष्णन का बेटा है। आपको यह पता होगा कि नोरायण मूर्ति ने अपनी पत्नि सुधा मूर्ति से 10 हजार रूपए उधार लेकर 1981 में इंफोसिस क
Post a Comment

Dulong and Petit's law

Dulong and Petit's law

  • According to Dulong and Petit's law the product of atomic weight and specific heat for all the elements in its solid state is always constant and its value is approximately 6.4. 
  • This law is used to determine the atomic weight of substance.

    Dulong and Petit’s law from Kinetic theory

  • According to the law of equi-partition of energy, the average kinetic energy of translation associated with each degree of freedom is 1/2kT.
  • If the oscillatory motion of atom is simple harmonic then in each oscillation the average kinetic energy = Average potential energy.
        Total energy associated with each degree of freedom of atom 
                                    = 1/2 kT + 1/2 kT = kT
        Since there are three degrees of freedom for oscillatory motion of each atom
        So the total energy of each atom = 3kT
        If we consider the 1 gm-atom of any solid at absolute temperature T
        So the number of atoms in 1 gm-atom of gas = N, where N is Avogadro number
        Total energy of 1 gm of solid
                  U = N * 3 kT = 3NkT                      [ R = Nk ]
                  U = 3RT
                 dU/dT = 3R
        Since dU/dT is the atomic heat of solid at constant volume i.e., Cv            
        So,    Cv = 3R
        Since R = 1.98 cal/gm-atom/°C
        So,    Cv = 3 * 1.98 = 5.94 cal/gm-atom/°C
        Atomic heat of solid = 6 cal cal/gm-atom/°C  (approximate)
       Thus it agrees with Dulong and Petit's law

Failure of Dulong and Petit's law

  • C, B, Si like non-metallic elements have value of atomic heat different from 6.4 at normal temperature (about 6.0).
  • But above 500°C their value tends to about 6.4.
  • At absolute zero temperature the value of atomic heat of all the elements tends to zero.
It is clear from the following figure


        Explanation of Failure of Dulong and Petit's law




To know about this lecture in more detail please visit on https://youtu.be/R_xEBgzUmkQ


Labels:

Comments

Post a Comment

Popular posts from this blog

Electric field due to circular loop of charge | Electromagnetics

Electric field due to circular loop of charge Electric field The space around a charged particle in which another charge experience a force is known as electric field. The source of electric field is either a charge or a time varying magnetic field. If the value of electric field does not change with time, then it will be uniform electric field, otherwise it will be non-uniform electric field. Electric field due to circular loop of charge If λ is linear charge density, then the charge on d l dq = λ d l      ⇒     dq = (q / 2πa) d l Electric field at P due to charge dq Special cases When P lies at the centre of the loop i. e., r = 0, then E = 0 When P lies very far from the centre of the loop i. e., r >> a, then E = kq / r 2 In this case circular loop behaves as a point charge. To know more about this topic please click on the link  https://youtu.be/54MIe0Ow43w   or   https://youtu.be/9bR1LfbVrGw
Post a Comment
Read more

Constraints | Classification and Properties of constraints | Classical mechanics

Constraints and its classification Constraints force Constraints are restrictions that limit the motion of the particles of a system. Physically constrained motion is realized by the forces which arise when the object in motion is in contact with the constraining surfaces or curves. These forces are called constraint forces. Properties of constraints force They are elastic in nature and appear at the surface of contact. They are so strong that they barely allow the body under consideration to deviate even slightly from a prescribed path or surface. This prescribed path or surface is called a constraint. The effect of constraint force is to keep the constraint relations satisfied. Classification of constraints           Scleronomic and Rheonomic This classification is based on time. The constraints are said to be scleronomic constraints, if the constraint relations do not explicitly depend on time. But if the constraint relations explicitly depend on ti
Post a Comment
Read more

Advantage and Disadvantage of Power Electronics

Advantage and Disadvantage of Power Electronics Advantage of Power electronics Power electronics is used in space shuttle power supplies Since there is very low loss in power electronic devices so its efficiency is very high. Power electronic converter systems are highly reliable. Since there is no moving parts in power electronic systems so it has long life and also its maintenance cost is very less. The power electronic systems has fast dynamic response in comparison to electromechanical converter systems. Since the power electronic system has small size and also it has less weight so they occupy less floor space and hence their installation cost is also less. Now these days power equipments are being mostly used, so power semiconductor devices are being produced on a large scale, resulting in lower cost of converter equipment. Power electronics are used in computer and office equipments. It is used in uninterruptible power supplies. Power
Post a Comment
Read more

Adesterra