“The Knowledge Library”

Knowledge for All, without Barriers…

An Initiative by: Kausik Chakraborty.

“The Knowledge Library”

Knowledge for All, without Barriers……….
An Initiative by: Kausik Chakraborty.

The Knowledge Library

Physics

what is semiconductor?

A semiconductor is a material that has electrical conductivity between that of a conductor (such as copper) and an insulator (such as glass). This intermediate

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Superconductors

Understanding Superconductors A superconductor is a material that, under specific conditions, displays four distinct changes indicating its transition to the superconducting state. (1) Electronic Effect:

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Superconductivity

What is Superconductivity? Zero Resistance: Superconductivity occurs when a material offers almost zero resistance to the flow of electric current, enabling energy-efficient electrical appliances and lossless

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String Theory

What is String Theory? String theory provides a theoretical framework in which all particles, from photons to quarks, are one-dimensional strings as opposed to zero-dimensional

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Sand Battery

What is the Sand Battery System? The battery is a massive steel silo, 7 m tall and 4 m wide with 100 tonnes of sand,

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Junction Transistor

Introduction Transistors, which are tiny electronic components, have two main uses. They can act as switches to control circuits and amplify signals. There is a

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What is Physics

Physics is the study of the forces, the energy, and the matter that make up the Universe and everything in it. APPLIED PHYSICS uses the discoveries

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Images: Mirrors

Images formed by Concave Mirror Position of object Position of image Nature of image At infinity At focus (F) Real, diminished, inverted Beyond centre of

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Images: Lenses

Images formed by Convex Lens Position of object Position of image Nature of image At infinity At focus Real, diminished, inverted At 2F At 2F

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Facts: Sound

Facts to Remember The speed of sound is 343 m/s The audible range of sound in human beings is 20 Hz to 20,000 Hz The

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Important Physics Notes

📕 परम ताप: परम ताप केल्विन तापक्रम पर आधारित है जिसके अनुसार दाब पर पानी का हिमांक 263∘K और क्थनांक 363∘K होता है | परम

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Why Does Ice Float?

Ice floats due its density, and because of the intricacies of buoyancy versus gravitational force. Water is a compound which exists in three forms: solid,

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Convert Celsius to Fahrenheit

The units used to denote temperature include Celsius (Centigrade), Kelvin, and Fahrenheit. Celsius and Fahrenheit are units for measuring temperature used in contemporary society. Temperature

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Celsius to Kelvin

The starting points of Celsius (C) and Kelvin (K) are different. What is Temperature? Temperature is the intensity of hotness or coldness of an object.

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What is Kelvin?

To understand heat, we have to get down to the molecular level. Heat is energy. It’s caused by the movement of atoms. The faster an object’s atoms move, the hotter it

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How Can a Voice Break Glass?

The laws of physics show that every piece of glass — actually, every material on Earth — has a natural resonant frequency. That frequency is the speed at which it will

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How Do Mirrors Work?

Basically, anything with a smooth surface that reflects almost all of the light that hits it — with only very little light absorbed or scattered

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Formula

Work = force × distance कार्य = बल × दूरी 2. Energy = force × distance ऊर्जा = बल × दूरी 3. Speed = distance

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Units of Measurements

Quantity – Units (S.I.) ●Length – Metre ●Time – Second ●Mass – Kilogram ●Area – Square meter ●Volume – Cubic meter ●Velocity – Metre/second ●Acceleration

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What is an Optical Illusion?

Optical illusions are images or pictures that we perceive differently than they really are. Put another way, optical illusions occur when our eyes send information to our brains that tricks

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How Does 3D Work?

3D stands for three-dimensional. “Regular” movies are 2D, or two-dimensional. What are dimensions, and what’s the difference? Dimensions are properties of space. They refer to extension in a particular

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What Does a Barometer Measure?

Can you feel the pressure? It’s around you…all the time…everywhere you go. What is it? Atmospheric pressure — often referred to simply as air pressure — is the constant force exerted on you

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