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Author Archives: admin

Acceleration due to gravity formula and problems

What is gravitational acceleration? Acceleration of a freely falling bodies is called gravitational acceleration.The value of gravitational acceleration is 10 ms-².   Why value of g varies with altitude? Above formula shows that the value of acceleration due to gravity g depends on the radius of the earth at its surface.The value of g is inversely  proportional to the square ...

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Archimedes principle formula and buoyant force

Pascal law Archimedes law Archimedes principle states that When an object is totally or partially immersed in a liquid, an upthrust acts on it equal to the weight of the liquid it displaces. An air filled balloon immediately shoots up to the surface when released under water. The same would happen if a piece of wood is released under water. ...

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Refraction of light:Definition,causes,laws,examples and applications

“The process of bending of light as it passes from air into glass and vice versa is called refraction of light.” Why does refraction occur? If we dip one end of a pencil or some other object into water at an angle to the surface, the submerged part looks bent. Its image is displaced because the light coming from the ...

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dot product and cross product of vectors with examples and properties

 What is dot product of two vectors? When two vectors are multiplied with each other and answer is a scalar quantity then such a product is called scalar product or dot product of vectors. A dot (.) is placed between vectors which are multiplied with each other that’s why it is also called “dot product”. Scalar = vector .vector Vector ...

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Magnetic flux density:Definition,unit,formula and applications

Magnetic Flux definition The group of force lines going from the north pole to the south pole of a magnet is called the magnetic flux, symbolized by Φ (the Greek letter phi). The number of lines of force in a magnetic field determines the value of the flux. The more lines of force, the greater the flux and the stronger the magnetic ...

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Conservation of mechanical energy derivation and (5 examples )

Conservation of M.energy example A roller-coaster car moving without friction illustrates the conservation of mechanical energy.   Conservation of mechanical energy derivation To see what gravitational potential energy is good for, suppose the body’s weight is the only force acting on it,so: The body is then falling freely with no air resistance and can be moving either up or down. ...

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Different types of electromagnetic radiation spectrum with examples

What is Electromagnetic Spectrum? The word spectrum comes from a Latin word meaning “form” or “appearance”. Other familiar words from the same root include “spectacle” and “species.” Newton introduced word to describe the rainbow-like image that resulted when a beam of sunlight passed through a glass prism. Today we speak of the electromagnetic spectrum to indicate the many different kinds ...

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Logic gates examples and applications

What are universal logic gates? Digital systems A digital systems deals with quantities or variable which have only two discrete values or states. The examples of such quantities are: A switch can be either open or close. A certain statement can be either true or false. The answer of a question can be either yes or no. A bulb can ...

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State faraday’s law of electromagnetic induction

Faraday’s law of induction was discovered through experiments carried out by Micheal Faraday in England In 1831 and by Joseph Henry in the United States at about the same time. *Even through Faraday published his results first, which gives him priority of discovery, the SI unit of inductance is called the henry (abbreviation H). On the other hand, the SI ...

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Planck’s radiation law derivation

Definition Planck’s radiation law Rayleigh Jeans law and Wien’s formulae were failed to solve the problem of distribution of spectral radiancy among various wavelengths in cavity radiations because these formulas were based upon the classical theory. Planck’s quantum theory of radiation In 1900,Max Planck gave the new concept about the nature of radiation,called quantum theory of radiation in which planck ...

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