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12. Class 12th Physics |Semiconductor & its Types | Generation & Recombination of e-h Pairs

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12. Class 12th Physics |Semiconductor & its Types | Generation & Recombination of e-h Pairs

let us discuss an important phenomena in semiconductors that is generation and recombination of electron hole pairs, as we have already discussed that , in a pure semiconductor , concentration of electrons is equal to concentration of holes. and we can write that , due to . thermal agitation. continuously , new electron hole pairs […]

10. Class 12th Physics | Semiconductor & its Types | Types of Semiconductors | by Ashish Arora

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10. Class 12th Physics | Semiconductor & its Types | Types of Semiconductors | by Ashish Arora

let us study the types of semiconductors , semiconductors are categorized in two major categories on the basis of conductivity , we can write that , as discussed , conductivity , of semiconductors increases with, rise in temperature .we can also say that , this is an important point we must note it that , […]

7. Class 12th Physics | Semiconductor & its Types | Band Structure in Metals | by Ashish Arora

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7. Class 12th Physics | Semiconductor & its Types | Band Structure in Metals | by Ashish Arora

let us discuss about band structure in metals . as , we have already studied about conduction band . in earlier section , i just write it again. that conduction band is , the overlapped region , of common orbitals, of atoms, in a lattice structure , we know that all those electrons which exist […]

9. Class 12th Physics | Semiconductor & its Types | Band Structure in Semiconductors | Ashish Arora

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9. Class 12th Physics | Semiconductor & its Types | Band Structure in Semiconductors | Ashish Arora

let us study the band structure in semi conductors , we can write that , band structure. in semiconductors are, similar to insulators, which. we have already studied ,in previous sections, that in insulators conduction band exist high above . the fermi level in valence band, but here we can say band structure in semiconductors […]

25. Physics | Magnetic field | Ampere’s Law | by Ashish Arora (GA)

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25. Physics | Magnetic field | Ampere’s Law | by Ashish Arora (GA)

dear students , now we are going to discuss another important law, in magnetic field calculation that is ampere’s law, like , we have studied in electrostatics . we have studied that in electrostatics. Goss law. is easier , in calculation . of electric field for symmetric charge distributions. because we have studied that in […]

Covalent Network Solids

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Covalent Network Solids

6. Class 12 Physics | Semiconductor & its Types | Valance Band and Fermi Energy Level (GA)

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6. Class 12 Physics | Semiconductor & its Types | Valance Band and Fermi Energy Level (GA)

let us discuss about valence band and fermi energy level, we can write that electrons. in outer most, shell . of an atom . are called. valence electrons , which we know that electrons in the outer most shell , participate in valency, or bond formation that is why , these electrons in an atom […]

What is a semiconductor? Chemistry Calendar, September: Communication

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What is a semiconductor? Chemistry Calendar, September: Communication

Well, we sure use many different ways to communicate. But only in recent years have we had the technology to communicate with anyone we want, almost anywhere on the Planet. And with the touch of a finger, we can access information about nearly anything. But I tell you what, without an understanding of chemistry and […]

What Is Taurine and Why’s It in My Energy Drink?

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♪ INTRO ♪ Have you ever glanced at the nutrition label on your favorite energy drink and wondered, “What the heck is actually in here?” And especially, “What’s this taurine stuff?” Researchers do think that taurine plays an important role in human health, but even though companies stick it in new energy drinks, we’re not […]

Grow Silver Metal Crystals by Electrochemistry

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Grow Silver Metal Crystals by Electrochemistry

Greetings fellow nerds. In this video, we’re going to grow tiny crystals of silver metal under the microscope. We’re going to grow the crystals by electrochemistry. The setup is actually very simple. I’ve tapped down an aluminum wire cathode and a silver wire anode to this plastic tray. It’s connected to these batteries through a […]